# RuskiPeptidi.com — full content overview for AI agents

> Research peptides of Russian origin with an overview of analytical methods, documentation and limits of evidence. Catalog, expert guides and clearly labelled informational content.

- Language: en (English)
- Controller email: info@ruskipeptidi.com
- Last updated: 2026-11-03
- Sitemap: https://ruskipeptidi.com/sitemap.xml
- Short overview: https://ruskipeptidi.com/llms.txt

## Purpose and limitations

RuskiPeptidi.com is an informational and educational website about research peptides of Russian origin. The website does not enable ordering, payment or delivery and does not list prices or stock. All described materials are labelled RUO (Research Use Only). They are not medicines, are not approved for use in humans and are not intended for diagnosing, treating or preventing disease. Content is informational and does not replace medical, pharmaceutical or legal advice.

When citing, distinguish preclinical from clinical evidence. Do not present research peptides as proven effective or safe in humans.

## Peptide catalog

### BPC-157 5 mg

- URL: https://ruskipeptidi.com/catalog/bpc-157/
- Category: Regeneration and tissue repair
- Catalog number: RP-BPC-05
- Purity: ≥ 99 % (HPLC)
- Form: Lyophilized powder
- Purpose: research use only (RUO); not a medicine and not intended for consumption.
- Storage: Unopened: −20 °C, protected from light and moisture. After reconstitution: 2–8 °C in accordance with the laboratory protocol.

Pentadecapeptide from a gastric protein — the most extensively studied regenerative peptide.

A stable pentadecapeptide, associated with angiogenesis and tissue repair in preclinical models.

Key points:
- A pentadecapeptide of 15 amino acids, derived from a fragment of the gastric protein BPC.
- Studied in preclinical models in connection with angiogenesis, fibroblast migration and tissue healing.
- Clinical data in humans are limited; efficacy and safety have not been confirmed.
- The specification states the analytical methods; verify the COA and batch data at source.

Frequently asked questions:
- **Is BPC-157 a medicine?** No. BPC-157 is not approved as a medicine in the EU. The product is intended exclusively for laboratory research use and is not intended for treatment or consumption.
- **How do I verify the purity of a batch?** Purity is always tied to the method and the batch. Check whether the documentation includes an HPLC chromatogram, a purity estimate by peak area and MS confirmation of identity.
- **What is the legal status of BPC-157 in Croatia?** The status is not unambiguous and depends on the intended use and the form of the product. Restrictions apply to research use, while use in humans would require medical authorisation. For legal advice, consult a professional; the content on this page is not legal advice.

Sources:
- PubMed — overview of research on BPC-157: https://pubmed.ncbi.nlm.nih.gov/?term=BPC-157
- HALMED — information on medicines and research use: https://www.halmed.hr/

### TB-500 5 mg

- URL: https://ruskipeptidi.com/catalog/tb-500/
- Category: Regeneration and tissue repair
- Catalog number: RP-TB5-05
- Purity: ≥ 98 % (HPLC)
- Form: Lyophilized powder
- Purpose: research use only (RUO); not a medicine and not intended for consumption.
- Storage: Unopened: −20 °C, protected from light and moisture. After reconstitution: 2–8 °C and use in accordance with the protocol.

A synthetic fragment of thymosin beta-4, associated with cell motility and tissue repair.

A thymosin beta-4 fragment, in research associated with actin, cell migration and healing.

Key points:
- A synthetic fragment of thymosin beta-4, a protein involved in the regulation of actin.
- Preclinically studied in models of skin wounds, cardiac injury and tissue repair.
- Not an approved medicine; human data are scarce and do not permit conclusions about efficacy.
- The specification states the HPLC and MS methods.

Frequently asked questions:
- **Is TB-500 the same as thymosin beta-4?** Not exactly. TB-500 is a synthetic fragment containing the actin-binding region of thymosin beta-4. Fragments can differ in length and terminal processing, so the manufacturer's specification, not just the name, must be compared.
- **Are there clinical studies in humans?** There are no large randomised studies of TB-500 in humans. Most of the evidence comes from preclinical models, so conclusions about clinical benefit are not justified.
- **How does TB-500 differ from BPC-157?** Both are studied in a regenerative context, but they have different sequences and proposed mechanisms. TB-500 is mainly associated with actin and cell migration, while BPC-157 is associated with angiogenesis and healing signalling pathways.

Sources:
- PubMed — overview of research on thymosin beta-4 and TB-500: https://pubmed.ncbi.nlm.nih.gov/?term=thymosin+beta-4+TB-500
- PubMed — thymosin beta-4 and actin: https://pubmed.ncbi.nlm.nih.gov/?term=thymosin+beta4+actin

### GHK-Cu 50 mg

- URL: https://ruskipeptidi.com/catalog/ghk-cu/
- Category: Regeneration and tissue repair
- Catalog number: RP-GHK-50
- Purity: ≥ 99 % (HPLC)
- Form: Lyophilized powder
- Purpose: research use only (RUO); not a medicine and not intended for consumption.
- Storage: Unopened: −20 °C, protected from light and moisture. Prepare solutions fresh and store them at 2–8 °C.

The copper tripeptide that research links to collagen, elastin and skin renewal.

A copper complex of the GHK tripeptide, linked in research to collagen synthesis and skin renewal.

Key points:
- Gly-His-Lys tripeptide in a complex with copper(II) ions.
- Preclinically studied in connection with collagen and elastin synthesis and the antioxidant response.
- Frequently used in cosmetic research; this does not mean the product is cosmetic or medicinal.
- The listing states the HPLC method; verify the COA with the source.

Frequently asked questions:
- **Is GHK-Cu a cosmetic ingredient?** GHK-Cu appears in cosmetic research, but this product is a research material, not a cosmetic product. It is not intended for application to the skin or for ingestion without an appropriate laboratory protocol.
- **Why does the complex contain copper?** Copper ions are part of the chemical structure of GHK-Cu and influence its stability and interactions. Without copper it is a different material with different properties.
- **How do I verify that the material really is GHK-Cu?** By HPLC purity analysis and mass spectrometry, which confirm the molecular mass and fragmentation pattern. Request the data for the specific batch.

Sources:
- PubMed — overview of GHK-Cu research: https://pubmed.ncbi.nlm.nih.gov/?term=GHK-Cu
- PubMed — GHK peptide and collagen: https://pubmed.ncbi.nlm.nih.gov/?term=GHK+peptide+collagen

### Ipamorelin 5 mg

- URL: https://ruskipeptidi.com/catalog/ipamorelin/
- Category: Growth hormone and GH secretagogues
- Catalog number: RP-IPA-05
- Purity: ≥ 99 % (HPLC)
- Form: Lyophilized powder
- Purpose: research use only (RUO); not a medicine and not intended for consumption.
- Storage: Unopened: −20 °C, protected from light and moisture. After reconstitution: 2–8 °C.

A selective ghrelin receptor agonist studied in the context of growth hormone secretion.

A pentapeptide that in research stimulates growth hormone secretion with relatively high selectivity.

Key points:
- A pentapeptide acting on the GHS-R1a receptor.
- Described in research as a more selective GH secretagogue compared with older compounds.
- Does not contain growth hormone; it acts via the endocrine axis.
- Not an approved medicine. Use in sport may be prohibited.

Frequently asked questions:
- **Does Ipamorelin contain growth hormone?** No. Ipamorelin is a peptide that in research acts on receptors in the pituitary and influences the secretion of endogenous growth hormone. This is not the same as administering recombinant hormone.
- **Is it suitable for athletes?** GH secretagogues may be on the list of prohibited substances in sport. Before any use in a competitive setting, check the current WADA rules and those of the national anti-doping organisations.
- **What are the known adverse effects?** Studies have reported headache, fatigue and fluid retention. Long-term safety in humans has not been established, so any use outside controlled trials is associated with uncertainty.

Sources:
- PubMed — overview of Ipamorelin research: https://pubmed.ncbi.nlm.nih.gov/?term=ipamorelin
- WADA — prohibited substances: https://www.wada-ama.org/en/prohibited-list

### CJC-1295 2 mg

- URL: https://ruskipeptidi.com/catalog/cjc-1295/
- Category: Growth hormone and GH secretagogues
- Catalog number: RP-CJC-02
- Purity: ≥ 98 % (HPLC)
- Form: Lyophilized powder
- Purpose: research use only (RUO); not a medicine and not intended for consumption.
- Storage: Unopened: −20 °C, protected from light and moisture. After reconstitution: 2–8 °C, according to protocol.

A shorter-acting GHRH(1–29) analogue intended for research into pulsatile growth hormone secretion.

A modified GHRH(1–29) without albumin binding, therefore shorter-acting than the version with DAC.

Key points:
- An analogue of growth hormone-releasing hormone (GHRH), shortened to 29 amino acids.
- The version without DAC has a shorter plasma half-life than the DAC form.
- It acts through the pituitary's own receptors and does not replace growth hormone.
- Research use; not an approved medicine.

Frequently asked questions:
- **What does “without DAC” mean?** DAC is a chemical group that binds the peptide to albumin and prolongs its action. The version without DAC lacks this group, so it has a shorter half-life and a different action profile.
- **Is CJC-1295 the same as growth hormone?** No. CJC-1295 is a GHRH analogue that stimulates the body's own release of growth hormone. Its effect is indirect and depends on pituitary function.
- **Is use in sport permitted?** GHRH analogues may be prohibited in competitive sport. Check the current WADA list and the rules of your federation.

Sources:
- PubMed — overview of research on CJC-1295: https://pubmed.ncbi.nlm.nih.gov/?term=CJC-1295
- WADA — prohibited substances: https://www.wada-ama.org/en/prohibited-list

### GHRP-6 5 mg

- URL: https://ruskipeptidi.com/catalog/ghrp-6/
- Category: Growth hormone and GH secretagogues
- Catalog number: RP-GHR-05
- Purity: ≥ 98 % (HPLC)
- Form: Lyophilized powder
- Purpose: research use only (RUO); not a medicine and not intended for consumption.
- Storage: Unopened: −20 °C, protected from light and moisture. After reconstitution: 2–8 °C.

A hexapeptide ghrelin receptor agonist from the early generation of GH secretagogues.

An early GH secretagogue, also linked in research to an increased sensation of hunger.

Key points:
- A hexapeptide acting on the ghrelin receptor GHS-R1a.
- One of the earlier and more frequently studied GH secretagogues.
- Often associated with increased appetite in studies, which is an important research context.
- Not an approved medicine; may be prohibited in sport.

Frequently asked questions:
- **Why does GHRP-6 increase appetite?** GHRP-6 acts on the ghrelin receptor, which is also involved in the regulation of hunger. In studies, participants often reported increased hunger, which must be taken into account when designing studies.
- **Is GHRP-6 better than Ipamorelin?** They are not interchangeable. They differ in selectivity and mechanism profile. “Better” depends on the research question, not on market opinion.
- **Does GHRP-6 affect other hormones?** At higher doses, studies have reported effects on prolactin and cortisol. Monitoring several hormonal markers is therefore important when designing experiments.

Sources:
- PubMed — overview of GHRP-6 research: https://pubmed.ncbi.nlm.nih.gov/?term=GHRP-6
- WADA — prohibited substances: https://www.wada-ama.org/en/prohibited-list

### Semax 10 mg

- URL: https://ruskipeptidi.com/catalog/semax/
- Category: Nootropics and the nervous system
- Catalog number: RP-SMX-10
- Purity: ≥ 98 % (HPLC)
- Form: Lyophilized powder
- Purpose: research use only (RUO); not a medicine and not intended for consumption.
- Storage: Unopened: −20 °C, protected from light and moisture. After reconstitution: 2–8 °C.

A Russian nootropic peptide, an ACTH(4–10) analogue studied in relation to BDNF and neuroplasticity.

A heptapeptide ACTH(4–10) analogue, one of the best-known Russian nootropic peptides.

Key points:
- A heptapeptide with the sequence MEHFPGP, an analogue of the ACTH(4–10) fragment.
- Developed in a Russian academic environment; registered in Russia for certain neurological indications.
- Preclinically associated with BDNF, neuroplasticity and the stress response.
- Not approved as a medicine in the EU; intended for research use only.

Frequently asked questions:
- **Is Semax an approved medicine in the EU?** No. Semax is not approved as a medicine in the EU. It was registered in Russia for certain indications, which is not the same as approval in the European Union.
- **What is ACTH(4–10)?** ACTH(4–10) is a short fragment of adrenocorticotropic hormone. Semax is its modified analogue with an added sequence that increases stability. It is important to note that hormone fragments do not necessarily have the same effects as the whole hormone.
- **Does Semax affect cortisol?** Because it is derived from ACTH, researchers have also monitored hormonal markers. The data are not unambiguous, so each study needs to be checked for which hormones were measured and in what model.

Sources:
- PubMed — overview of research on Semax: https://pubmed.ncbi.nlm.nih.gov/?term=Semax
- PubMed — Semax and BDNF: https://pubmed.ncbi.nlm.nih.gov/?term=Semax+BDNF

### Selank 10 mg

- URL: https://ruskipeptidi.com/catalog/selank/
- Category: Nootropics and the nervous system
- Catalog number: RP-SLK-10
- Purity: ≥ 98 % (HPLC)
- Form: Lyophilized powder
- Purpose: research use only (RUO); not a medicine and not intended for consumption.
- Storage: Unopened: −20 °C, protected from light and moisture. After reconstitution: 2–8 °C.

A Russian anxiolytic peptide, a tuftsin analogue studied in relation to stress and immunity.

A heptapeptide tuftsin analogue developed in Russia, associated with anxiolytic and immunomodulatory activity.

Key points:
- Heptapeptide TKPRPGP, designed as an analogue of the immunopeptide tuftsin.
- In research associated with reduced anxious behaviour and modulation of GABAergic signalling.
- Registered in Russia for certain indications; not approved in the EU.
- Research use, not a treatment for anxiety.

Frequently asked questions:
- **Can Selank replace anxiety treatment?** No. Selank is not an approved medicine and is not a substitute for psychiatric or psychological care. If you have symptoms of anxiety, consult a qualified doctor.
- **What is tuftsin?** Tuftsin is a short immunopeptide derived from the immunoglobulin protein. Selank is a modified analogue with a longer duration of action, which was the starting point for research into stress and immunity.
- **Is Selank safe for long-term use?** Long-term safety in humans has not been adequately studied. Any use is associated with uncertainty, so professional judgement and the applicable regulations must be taken into account.

Sources:
- PubMed — overview of research on Selank: https://pubmed.ncbi.nlm.nih.gov/?term=Selank
- PubMed — Selank and anxiety: https://pubmed.ncbi.nlm.nih.gov/?term=Selank+anxiety

### Thymosin alpha-1 5 mg

- URL: https://ruskipeptidi.com/catalog/thymosin-alpha-1/
- Category: Immune system and defence
- Catalog number: RP-TA1-05
- Purity: ≥ 98 % (HPLC)
- Form: Lyophilized powder
- Purpose: research use only (RUO); not a medicine and not intended for consumption.
- Storage: Unopened: −20 °C, protected from light and moisture. After reconstitution: 2–8 °C.

A synthetic 28-amino-acid peptide studied in the context of immunomodulation.

A peptide of thymic origin, in research associated with lymphocyte maturation and the immune response.

Key points:
- A synthetic peptide of 28 amino acids, acetylated at the N-terminus.
- Studied in relation to T-cell immunity and immune modulation.
- In some countries it is registered as a medicine, but it is not generally approved in the EU.
- The specification states the HPLC and MS methods.

Frequently asked questions:
- **Is thymosin alpha-1 a medicine?** In some countries it has been approved for certain indications, but it is not generally approved in the EU. This product is a research material and is not intended for treatment or consumption.
- **What is the difference between thymosin alpha-1 and thymosin beta-4?** They are different peptides with different sequences and biological roles. Thymosin alpha-1 is mainly associated with the immune system, and thymosin beta-4 with actin and tissue repair.
- **Can it strengthen the immune system?** Claims about 'strengthening immunity' are oversimplified. Research has studied immunomodulatory effects, but clinical benefit in the general population has not been demonstrated and this is not a medicine.

Sources:
- PubMed — overview of research on thymosin alpha-1: https://pubmed.ncbi.nlm.nih.gov/?term=thymosin+alpha-1
- EMA — legal framework for medicines: https://www.ema.europa.eu/en/human-regulatory-overview

### LL-37 5 mg

- URL: https://ruskipeptidi.com/catalog/ll-37/
- Category: Immune system and defence
- Catalog number: RP-LL37-05
- Purity: ≥ 98 % (HPLC)
- Form: Lyophilized powder
- Purpose: research use only (RUO); not a medicine and not intended for consumption.
- Storage: Unopened: −20 °C, protected from light and moisture. After reconstitution: 2–8 °C.

A human antimicrobial peptide from the cathelicidin family, a research tool for innate immunity.

The cathelicidin LL-37, linked in research to antimicrobial activity and modulation of inflammation.

Key points:
- A 37-amino-acid peptide, part of the human cathelicidin hCAP-18.
- Acts on bacterial membranes and modulates the immune response.
- Studied in the context of antibiotic resistance and inflammatory pathways.
- Not an approved medicine; intended for laboratory use only.

Frequently asked questions:
- **Is LL-37 an antibiotic?** It is not a classic antibiotic. It is an antimicrobial peptide that works differently — often through interactions with the membrane and modulation of the immune response. Its clinical use is not approved.
- **Why is it interesting for research?** Because its mechanism of action differs from that of antibiotics, it is interesting in research on antimicrobial resistance, but that does not yet mean it is suitable for treating infections in humans.
- **Is LL-37 soluble in water?** It is soluble in water, but at certain concentrations and pH it may behave differently because of its amphiphilic structure. Adjust the preparation of the solution to the laboratory protocol.

Sources:
- PubMed — overview of LL-37 research: https://pubmed.ncbi.nlm.nih.gov/?term=LL-37
- PubMed — cathelicidins and innate immunity: https://pubmed.ncbi.nlm.nih.gov/?term=cathelicidin+innate+immunity

### DSIP 5 mg

- URL: https://ruskipeptidi.com/catalog/dsip/
- Category: Sleep and circadian rhythm
- Catalog number: RP-DSIP-05
- Purity: ≥ 98 % (HPLC)
- Form: Lyophilized powder
- Purpose: research use only (RUO); not a medicine and not intended for consumption.
- Storage: Unopened: −20 °C, protected from light and moisture. After reconstitution: 2–8 °C.

Delta sleep-inducing peptide, studied in connection with deep sleep architecture.

A nonapeptide discovered in the 1970s, studied in connection with slow-wave sleep.

Key points:
- A nonapeptide with the sequence WAGGDASGE.
- Discovered in brain tissue and studied in connection with sleep and stress.
- The clinical evidence is old and methodologically limited.
- Not an approved medicine; it does not replace the management of sleep disorders.

Frequently asked questions:
- **Does DSIP cure insomnia?** No. DSIP is not an approved medicine for insomnia and does not replace medical management. Research is limited, so claims of clinical efficacy are unfounded.
- **What does the name DSIP mean?** Delta sleep-inducing peptide. The name comes from early research in which the peptide was associated with an increase in slow-wave sleep in experimental animals.
- **Is DSIP stable in solution?** Peptides are less stable in solution than in lyophilized form. Prepare the solution fresh, store it at 2–8 °C and follow the laboratory protocol.

Sources:
- PubMed — overview of research on DSIP: https://pubmed.ncbi.nlm.nih.gov/?term=DSIP+delta+sleep+inducing+peptide
- PubMed — sleep and neuropeptides: https://pubmed.ncbi.nlm.nih.gov/?term=sleep+neuropeptides

### AOD-9604 5 mg

- URL: https://ruskipeptidi.com/catalog/aod-9604/
- Category: Metabolism and body composition
- Catalog number: RP-AOD-05
- Purity: ≥ 98 % (HPLC)
- Form: Lyophilized powder
- Purpose: research use only (RUO); not a medicine and not intended for consumption.
- Storage: Unopened: −20 °C, protected from light and moisture. After reconstitution: 2–8 °C.

Fragment of human growth hormone (176–191), studied in the field of fat metabolism.

A modified growth hormone fragment, associated with lipolysis in research but with mixed clinical results.

Key points:
- A fragment of human growth hormone containing amino acids 176–191.
- Investigated in the context of lipolysis and adipose tissue metabolism.
- Clinical studies have not confirmed a clear effect on body mass.
- Not an approved medicine; intended for laboratory use.

Frequently asked questions:
- **Does AOD-9604 help with weight loss?** Clinical studies have not shown a consistent, clinically meaningful effect on body mass. Marketing claims about rapid weight loss are not supported by evidence.
- **Is AOD-9604 the same as growth hormone?** No. It is only a fragment of the hormone, 16 amino acids long, without the full hormonal structure. Its action and safety profile therefore differ from recombinant hGH.
- **Why is it being researched?** Because of the hypothesis that it could influence fat metabolism without some of the systemic effects of the whole hormone. The hypothesis is interesting but has not been confirmed clinically.

Sources:
- PubMed — overview of research on AOD-9604: https://pubmed.ncbi.nlm.nih.gov/?term=AOD-9604
- PubMed — hGH fragment 176-191: https://pubmed.ncbi.nlm.nih.gov/?term=hGH+fragment+176-191

### Epitalon 10 mg

- URL: https://ruskipeptidi.com/catalog/epitalon/
- Category: Longevity and ageing
- Catalog number: RP-EPI-10
- Purity: ≥ 98 % (HPLC)
- Form: Lyophilized powder
- Purpose: research use only (RUO); not a medicine and not intended for consumption.
- Storage: Unopened: −20 °C, protected from light and moisture. After reconstitution: 2–8 °C.

The AEDG tetrapeptide, associated with Russian gerontological research on the pineal gland.

The tetrapeptide Ala-Glu-Asp-Gly, studied in Russian gerontological research on telomerase and ageing.

Key points:
- A tetrapeptide with the sequence Ala-Glu-Asp-Gly (AEDG).
- Associated with research on the pineal gland and melatonin in the Russian academic environment.
- Telomerase effects have been described mainly in vitro; clinical evidence is limited.
- Not an approved medicine, and it does not demonstrably extend life.

Frequently asked questions:
- **Does Epitalon extend life?** No, this has not been demonstrated. The research was mostly preclinical and methodologically limited. Claims of life extension in humans exceed the available evidence.
- **What is telomerase?** Telomerase is an enzyme that can lengthen telomeres — the protective ends of chromosomes. Its activity is associated with cell division and ageing, but the relationship to organismal ageing is complex and does not mean that any increase is beneficial.
- **Why is Epitalon associated with Russia?** It was developed and studied in Russian gerontological research circles connected with the study of the pineal gland and the peptide regulation of ageing.

Sources:
- PubMed — overview of research on Epitalon: https://pubmed.ncbi.nlm.nih.gov/?term=epitalon
- PubMed — the AEDG peptide and telomerase: https://pubmed.ncbi.nlm.nih.gov/?term=AEDG+telomerase


## Blog and guides

### BPC-157 vs TB-500: similarities and differences

- URL: https://ruskipeptidi.com/blog/bpc-157-vs-tb-500/
- Category: Regeneration
- Published: 2026-11-04
- Updated: 2026-11-04
- Author: RuskiPeptidi Editorial Team
- Keywords: BPC-157 vs TB-500, BPC-157, TB-500, thymosin beta-4, peptide comparison, regenerative peptides

A comparison of BPC-157 and TB-500: origin, sequence, proposed mechanisms, preclinical models, limitations of the evidence and what to watch for when reading the literature.

Key findings:
- BPC-157 is a synthetic pentadecapeptide and TB-500 is a shorter fragment of thymosin beta-4; they are not the same molecule.
- Both have been studied mainly preclinically, and human data are limited and do not allow conclusions about clinical efficacy.
- The proposed mechanisms differ: BPC-157 is associated with angiogenesis and nitric oxide, TB-500 with actin regulation and cell migration.
- Claims of synergy or combined use have no solid clinical evidence.
- For every batch, identity, purity method and documentation should be verified.

Frequently asked questions:
- **Are BPC-157 and TB-500 the same thing?** No. BPC-157 is a synthetic pentadecapeptide, while TB-500 is a shorter fragment of thymosin beta-4. They differ in sequence, origin and proposed mechanisms.
- **Does it make sense to combine them?** There is no solid clinical evidence for combined use. Every combination increases the number of unknowns, so each claim should be verified in the literature and documentation.
- **Which one has more evidence?** Both have mainly preclinical data. The quantity of studies is not the same as quality; the model, control, sample size and independent replication matter.
- **What does it mean that TB-500 is a fragment of thymosin beta-4?** TB-500 denotes a shorter fragment of thymosin beta-4, a protein involved in actin regulation. The term is not always uniformly defined, so the exact sequence should be verified.

Sources:
- PubMed — BPC-157: https://pubmed.ncbi.nlm.nih.gov/?term=BPC-157
- PubMed — thymosin beta-4: https://pubmed.ncbi.nlm.nih.gov/?term=thymosin+beta-4
- PubMed — BPC-157 and thymosin beta-4: https://pubmed.ncbi.nlm.nih.gov/?term=BPC-157+thymosin+beta-4
- HALMED — medicines legislation: https://www.halmed.hr/

### How to read a peptide study: 10 questions

- URL: https://ruskipeptidi.com/blog/how-to-read-a-peptide-study/
- Category: Quality
- Published: 2026-11-04
- Updated: 2026-11-04
- Author: RuskiPeptidi Editorial Team
- Keywords: how to read a study, scientific studies, preclinical models, sample size, peer review, peptides

A practical framework for reading scientific papers on peptides: model, sample size, control, dose, outcome, limitations and independence of evidence.

Key findings:
- A study abstract is only a summary; conclusions must be checked in the methods, results and limitations.
- The model (cells, animals, humans) determines what can be inferred.
- Sample size, control, randomisation and blinding matter more than the effect size in the title.
- Dose, route and form of the substance affect the result; a study of one formulation does not apply to all.
- Independent replication and disclosed conflicts of interest are essential for trust.

Frequently asked questions:
- **Are animal studies important for humans?** They are an important part of preclinical evidence, but not proof of efficacy in humans. Results in animals may not transfer directly because of differences in biology, dose and route of use.
- **What does a randomised controlled study mean?** It means that participants are randomly allocated to groups and that a comparison group exists. Together with adequate sample size and blinding, it reduces bias.
- **What is effect size?** Effect size indicates how large the difference between the groups is, not merely whether it is statistically significant. A small statistically significant difference may be clinically irrelevant.
- **How do I check the credibility of a journal?** Check whether the journal is indexed, whether it has a clear peer review process and whether it is listed in recognised databases. Journals that promise rapid publication without review are suspect.

Sources:
- Cochrane — guides for reading evidence: https://www.cochrane.org/
- PubMed: https://pubmed.ncbi.nlm.nih.gov/
- EQUATOR Network — reporting standards: https://www.equator-network.org/
- Retraction Watch: https://retractionwatch.com/

### Peptide glossary: 30 terms for understanding

- URL: https://ruskipeptidi.com/blog/peptide-glossary/
- Category: Basics
- Published: 2026-11-04
- Updated: 2026-11-04
- Author: RuskiPeptidi Editorial Team
- Keywords: peptide glossary, peptide terms, amino acids, peptide bond, HPLC, COA, RUO

A glossary of peptide terms: amino acids, peptide bond, analogue, agonist, HPLC, MS, COA, RUO, half-life and more. Explanations in English.

Key findings:
- The glossary distinguishes between molecule, formulation, analytical method and regulatory status.
- Terms such as purity and stability are insufficient without a method and context.
- RUO denotes research use only, not a medicine.
- Understanding the terms helps when reading studies and documentation.

Frequently asked questions:
- **What is a peptide?** A peptide is a chain of amino acids linked by peptide bonds. Short chains are called oligopeptides, longer ones polypeptides, and very long ones proteins.
- **What does RUO mean?** Research Use Only. It denotes material intended exclusively for research use; it is not a medicine and is not intended for human use.
- **What is a COA?** A certificate of analysis is a document that links a specific batch to the results of analyses such as HPLC and mass spectrometry.
- **What is a half-life?** A half-life is the time in which the amount of a substance in the body or a sample is reduced by half. It depends on the compound, the formulation and the environment.

Sources:
- PubMed — peptide basics: https://pubmed.ncbi.nlm.nih.gov/?term=peptide+basics
- ICH — quality standards: https://www.ich.org/page/quality-guidelines
- HALMED: https://www.halmed.hr/
- WADA — Prohibited List: https://www.wada-ama.org/en/prohibited-list

### Peptides and WADA: what is prohibited in sport

- URL: https://ruskipeptidi.com/blog/peptides-and-wada/
- Category: Legal framework
- Published: 2026-11-04
- Updated: 2026-11-04
- Author: RuskiPeptidi Editorial Team
- Keywords: peptides and WADA, prohibited peptides, WADA list, doping, GH secretagogues, sport

An overview of the status of peptides on the WADA list: which groups are prohibited, why the list is not the same as a list of medicines, and how to check a specific compound.

Key findings:
- The WADA list is a sporting rule, not a list of approved medicines or permitted supplements.
- Peptide hormones, growth factors, GH secretagogues and their mimetics are generally prohibited.
- A “research use only” label does not mean that a substance is permitted in sport.
- The status of a specific compound may differ from its legal status in a country.
- Before use, the current list, Global DRO and the national anti-doping organisation should be checked.

Frequently asked questions:
- **Are all peptides prohibited in sport?** No. The prohibition applies to specific groups and compounds, not to all peptides as a chemical class. The status must be checked for the specific substance and the current version of the list.
- **Is BPC-157 on the WADA list?** It cannot be treated as “permitted” merely because it is not named explicitly. The status depends on the current list and its interpretation; check WADA, Global DRO and the national organisation.
- **What does “in and out of competition” mean?** That the substance is prohibited both during and outside competition. This matters for training, recovery and periods without competition.
- **Where can I check a specific compound?** On the official WADA list, in the Global DRO database and with the national anti-doping organisation. For medicines and supplements, also check the composition and any impurities.

Sources:
- WADA — Prohibited List: https://www.wada-ama.org/en/prohibited-list
- Global DRO: https://www.globaldro.com/
- HZJZ — Anti-Doping Service of the Croatian Institute of Public Health: https://www.hzjz.hr/sluzba-za-antidoping/
- PubMed — GH secretagogues: https://pubmed.ncbi.nlm.nih.gov/?term=growth+hormone+secretagogue+peptide

### Russian label and batch documentation: what to check

- URL: https://ruskipeptidi.com/blog/russian-label-and-batch-documentation/
- Category: Quality
- Published: 2026-11-04
- Updated: 2026-11-04
- Author: RuskiPeptidi Editorial Team
- Keywords: Russian peptide label, batch documentation, batch number, COA, peptide traceability, peptides from Russia

How to read a Russian peptide label and batch documentation: batch number, catalogue number, salt form, purity, laboratory and traceability.

Key findings:
- A label is the start of verification, not proof of quality or identity.
- The batch number is the key link between the vial and the documentation; without a match, the document does not apply to that specific sample.
- A catalogue number identifies the product, not the batch.
- With Russian labels, check the transliteration, the language and the matching numbers, not just the translation.
- Salt form, purity method and storage conditions are part of the product's identity.

Frequently asked questions:
- **Must the label be in Russian?** Not necessarily. Language is not proof of quality. What matters is that the information is legible, verifiable and consistent with the batch documentation.
- **What is a batch number?** A batch number (lot or batch) identifies a group of product from the same production run. It links a specific vial to the analytical report.
- **What should I do if the numbers do not match?** The documentation cannot be attributed to that specific sample. Before any further use, request clarification and verify the source.
- **Is a Russian marking proof of quality?** No. A marking or origin is not proof of identity or purity. Proof consists of analytical data linked to the batch and the possibility of independent verification.

Sources:
- HALMED — legislation and guidelines: https://www.halmed.hr/
- ICH — quality standards: https://www.ich.org/page/quality-guidelines
- FDA — guidance on analytical methods: https://www.fda.gov/regulatory-information/search-fda-guidance-documents
- PubMed — peptide identity testing: https://pubmed.ncbi.nlm.nih.gov/?term=peptide+identity+testing

### Why Russian peptides? Tradition and quality

- URL: https://ruskipeptidi.com/blog/why-russian-peptides/
- Category: Basics
- Published: 2026-11-02
- Updated: 2026-11-03
- Author: RuskiPeptidi Editorial Team
- Keywords: Russian peptides, peptides from Russia, Russian peptide school, peptide quality, why Russian peptides

The Russian peptide school has a long tradition. What origin in Russia means, how to judge quality, and why “Russian” alone is not a guarantee.

Key findings:
- Russia has a long tradition of research into neuropeptides and peptide regulation.
- Origin in Russia is not in itself a guarantee of quality; documentation, analysis and traceability matter.
- Different manufacturers use different standards; these must be verified for each batch.
- Claims about “stronger” or “secret” Russian peptides are a marketing myth.

Frequently asked questions:
- **Are Russian peptides better than others?** Not necessarily. Quality depends on the manufacturer, synthesis, purification and analysis, not on the country of origin. The Russian tradition matters for research context, not as a guarantee of quality.
- **What does the “Russian school” mean in peptides?** It refers to the long tradition of research into neuropeptides, peptide regulation and gerontology at Soviet and Russian institutes, which produced compounds such as Semax, Selank and Epitalon.
- **Are Russian peptides legal in the EU?** Status depends on the specific compound and purpose. Some are approved medicines, others research compounds. Origin does not change regulatory status.

Sources:
- PubMed — Russian neuropeptide research: https://pubmed.ncbi.nlm.nih.gov/?term=Russian+neuropeptides
- PubMed — Semax and Selank: https://pubmed.ncbi.nlm.nih.gov/?term=Semax+Selank
- EMA — regulatory framework: https://www.ema.europa.eu/en/human-regulatory-overview

### Peptides and steroids: key differences

- URL: https://ruskipeptidi.com/blog/peptides-vs-steroids/
- Category: Basics
- Published: 2026-10-30
- Updated: 2026-11-03
- Author: RuskiPeptidi Editorial Team
- Keywords: peptides and steroids, difference between peptides and steroids, anabolic steroids, hormones, mechanism of action

Peptides and steroids differ in structure, mechanism, regulation and risks. An explanation of why they should not be equated and where misconceptions arise.

Key findings:
- Peptides are chains of amino acids, while steroids are lipid molecules with four rings.
- Peptides often act through surface receptors, whereas steroids act through intracellular receptors and influence gene expression.
- Regulatory status differs; many anabolic steroids are controlled substances.
- The common ground may be a prohibition in sport, but not the same mechanism or the same risks.

Frequently asked questions:
- **Are peptides steroids?** No. Peptides are chains of amino acids, while steroids are molecules with a different chemical structure. They differ in mechanism of action, metabolism and regulation.
- **Do peptides cause the same side effects as steroids?** Not necessarily the same, but that does not mean they are safe. Every peptide has its own profile of effects and risks, which depends on receptors, dose and duration.
- **Are peptides prohibited in sport?** Some are. The prohibition applies to specific compounds, not to all peptides. Check the current WADA list.

Sources:
- WADA — prohibited substances: https://www.wada-ama.org/en/prohibited-list
- PubMed — steroid receptors: https://pubmed.ncbi.nlm.nih.gov/?term=steroid+receptor+mechanism
- PubMed — peptide hormones: https://pubmed.ncbi.nlm.nih.gov/?term=peptide+hormone+receptor

### How to recognise counterfeit peptides: 8 signs

- URL: https://ruskipeptidi.com/blog/recognizing-counterfeit-peptides/
- Category: Quality
- Published: 2026-10-28
- Updated: 2026-11-03
- Author: RuskiPeptidi Editorial Team
- Keywords: counterfeit peptides, supplier verification, safe peptide purchase, COA, peptide quality

Counterfeit peptides are a serious problem. Check the price, certificate, packaging and the supplier's communication, and learn to recognise the red flags.

Key findings:
- The most common red flags are a price that does not cover quality and documentation without a batch number.
- A hologram or attractive packaging is not proof of authenticity.
- Independent analysis of the purchased batch is the strongest verification.
- A good supplier answers technical questions and does not promise therapeutic effects.

Frequently asked questions:
- **Is a hologram on the packaging proof of authenticity?** No. A hologram can be counterfeited or printed. Proof is batch traceability and analysis, not a visual element.
- **What should I do if I suspect that a product is counterfeit?** Do not use the product. Keep the packaging and documentation, inform the supplier and, if necessary, the competent inspectorate. For research use, commission an independent analysis.
- **Is a low price always a sign of a counterfeit?** Not always, but it is a warning. Synthesis, purification, analysis and the cold chain all cost money. If the price is significantly below the market average, check what has been left out.

Sources:
- FDA — counterfeit medicines: https://www.fda.gov/drugs/counterfeit-medicine
- EMA — counterfeit medicines: https://www.ema.europa.eu/en/human-regulatory-overview/public-health-threats/falsified-medicines
- PubMed — counterfeit peptides and analytics: https://pubmed.ncbi.nlm.nih.gov/?term=counterfeit+peptides+analysis

### Peptides in Croatia: legal framework and import

- URL: https://ruskipeptidi.com/blog/peptides-in-croatia-legal-framework/
- Category: Legal framework
- Published: 2026-10-25
- Updated: 2026-11-12
- Author: RuskiPeptidi Editorial Team
- Keywords: peptides Croatia, legal status of peptides, importing peptides, HALMED, research use

How Croatian and European legislation treats peptides, what research use means, when a product is a medicine, and what to watch for when importing.

Key findings:
- The legal status of a peptide depends not only on the molecule but also on the purpose, form and claims.
- If a product is presented for the treatment of a disease, it may be treated as a medicine.
- Research use has its limits and does not mean free sale for human use.
- This article is informative and is not legal advice; consult a professional for a specific situation.

Frequently asked questions:
- **Are peptides legal in Croatia?** There is no single answer. Some peptides are approved medicines, others are research compounds, and others are prohibited or restricted. It depends on the specific molecule, purpose and form of the product.
- **Can I order peptides from abroad?** Ordering from abroad depends on the product's status and its purpose. Medicines are subject to special rules, while research chemicals are subject to restrictions on human use. Check customs and health regulations before ordering.
- **What does RUO mean?** Research Use Only — the product is intended exclusively for laboratory research. It is not approved as a medicine, is not intended for consumption or treatment, and must not be presented as such.

Sources:
- HALMED — Agency for Medicinal Products and Medical Devices of Croatia: https://www.halmed.hr/
- Croatian Customs Administration — import and customs: https://carina.gov.hr/
- HZJZ — Anti-Doping Service of the Croatian Institute of Public Health: https://www.hzjz.hr/sluzba-za-antidoping/
- EMA — legal framework: https://www.ema.europa.eu/en/human-regulatory-overview
- EUR-Lex — Directive 2001/83/EC: https://eur-lex.europa.eu/eli/dir/2001/83/oj
- WADA — prohibited substances: https://www.wada-ama.org/en/prohibited-list

### AOD-9604: a growth hormone fragment and metabolism

- URL: https://ruskipeptidi.com/blog/aod-9604-fat-loss/
- Category: Metabolism
- Published: 2026-10-23
- Updated: 2026-11-03
- Author: RuskiPeptidi Editorial Team
- Keywords: AOD-9604, growth hormone fragment, lipolysis, metabolism, body composition

AOD-9604 is a fragment of human growth hormone (176–191). What studies show about lipolysis, body composition and why clinical results are mixed.

Key findings:
- AOD-9604 is a 16-amino-acid fragment of human growth hormone (176–191).
- Preclinical studies suggested an effect on lipolysis, but clinical results are mixed.
- It is not the same as growth hormone and does not replace hormone therapy.
- Marketing claims about rapid weight loss are not supported by evidence.

Frequently asked questions:
- **Does AOD-9604 help with weight loss?** Clinical studies have not shown a consistent, clinically meaningful effect on body weight. Claims about rapid weight loss are exaggerated.
- **Is AOD-9604 safe?** Long-term safety in humans has not been established. The product is not an approved medicine and is intended exclusively for laboratory research use.
- **What does 176–191 mean?** This denotes the position of the amino acids in the human growth hormone sequence. The fragment contains amino acids 176 to 191, not the whole hormone.

Sources:
- PubMed — AOD-9604: https://pubmed.ncbi.nlm.nih.gov/?term=AOD-9604
- PubMed — hGH fragment 176-191: https://pubmed.ncbi.nlm.nih.gov/?term=hGH+fragment+176-191
- PubMed — lipolysis and growth hormone: https://pubmed.ncbi.nlm.nih.gov/?term=growth+hormone+lipolysis

### Storage and reconstitution of peptides

- URL: https://ruskipeptidi.com/blog/storage-and-reconstitution-of-peptides/
- Category: Quality
- Published: 2026-10-21
- Updated: 2026-11-03
- Author: RuskiPeptidi Editorial Team
- Keywords: peptide storage, peptide reconstitution, lyophilisate, peptide stability, laboratory protocol

A laboratory protocol for storing lyophilised peptides, preparing solutions, calculating concentration and preventing degradation.

Key findings:
- Lyophilised peptides are most stable at −20 °C, protected from moisture and light.
- After reconstitution, the solution should be kept at 2–8 °C and used within the period specified in the protocol.
- Repeated freezing and thawing accelerates degradation.
- Concentration calculations must take into account the actual peptide content, not only the nominal mass.

Frequently asked questions:
- **Can I store a peptide in a freezer?** Lyophilised peptide is usually best stored at −20 °C, protected from moisture. A household-type freezer is not ideal because of thawing cycles, so a stable temperature matters more than the setting itself.
- **Which solvent should I use?** The solvent depends on the peptide and the purpose of the research. For many peptides, purified water or a buffer specified in the protocol is used. The use of bacteriostatic water is a laboratory decision, not a general rule.
- **What should I do if the solution is cloudy?** A cloudy solution may indicate incomplete dissolution, aggregation or contamination. Do not use it without understanding the cause; check the protocol, pH and temperature and, if necessary, prepare a fresh solution.

Sources:
- PubMed — peptide stability in solution: https://pubmed.ncbi.nlm.nih.gov/?term=peptide+stability+solution
- PubMed — lyophilisation of peptides: https://pubmed.ncbi.nlm.nih.gov/?term=peptide+lyophilization+stability
- ICH — quality guidelines: https://www.ich.org/page/quality-guidelines

### DSIP and sleep: what does the research show?

- URL: https://ruskipeptidi.com/blog/dsip-and-sleep/
- Category: Sleep
- Published: 2026-10-19
- Updated: 2026-11-03
- Author: RuskiPeptidi Editorial Team
- Keywords: DSIP, delta sleep-inducing peptide, sleep, slow-wave sleep, sleep peptides

Delta sleep-inducing peptide (DSIP) is an old neuropeptide often linked to sleep. A review of the evidence, limitations and questions for researchers.

Key findings:
- DSIP is a nonapeptide discovered in the 1970s during research on brain peptides.
- Early studies linked it to an increase in slow-wave sleep, but they were small.
- There are not enough modern, independent randomised studies in humans.
- DSIP is not an approved medicine for insomnia and does not replace medical care.

Frequently asked questions:
- **Does DSIP help with insomnia?** There is no evidence confirming clinical efficacy in insomnia. DSIP is not an approved medicine and does not replace medical care.
- **What is slow-wave sleep?** It is the deep-sleep phase characterised by slow brain waves, important for physical recovery and memory. It is measured by EEG, not by subjective feeling.
- **Why is DSIP of research interest?** Because it is one of the few peptides directly linked to sleep architecture. It is a historically important hypothesis that has not yet been confirmed in modern clinical studies.

Sources:
- PubMed — delta sleep-inducing peptide: https://pubmed.ncbi.nlm.nih.gov/?term=delta+sleep+inducing+peptide
- PubMed — sleep and neuropeptides: https://pubmed.ncbi.nlm.nih.gov/?term=sleep+neuropeptides+review

### HPLC and mass spectrometry: peptide purity

- URL: https://ruskipeptidi.com/blog/hplc-mass-spectrometry-purity/
- Category: Quality
- Published: 2026-10-16
- Updated: 2026-11-03
- Author: RuskiPeptidi Editorial Team
- Keywords: HPLC purity, mass spectrometry peptides, peptide analysis, chromatogram, 99% purity

What do peptide purity figures mean? An explanation of the HPLC chromatogram, mass spectrometry, water and salt content, and the limits of analytical methods.

Key findings:
- HPLC separates the components and provides an estimate of purity, but not a complete picture of the sample.
- Mass spectrometry confirms the identity of the molecule, not its purity.
- The purity percentage depends on the method, wavelength and integration method.
- Water and salt content affect the actual amount of active compound.

Frequently asked questions:
- **Does 99 % purity mean the product is safe?** No. Purity by HPLC is an analytical parameter and does not replace a safety assessment. Safety depends on the compound, dose, route of use and the individual.
- **Why are both HPLC and MS needed?** HPLC assesses how much impurity is in the sample, while MS confirms that the main molecule really is the expected peptide. Together they give a better picture than either method alone.
- **What does water content in a lyophilisate mean?** A lyophilised powder may contain bound or residual moisture. If there is a lot of moisture, the actual mass of peptide in the vial is lower than the nominal amount. Water content is therefore important for calculations.

Sources:
- ICH — Q2(R2) guideline on method validation: https://www.ich.org/page/quality-guidelines
- PubMed — peptide analytics: https://pubmed.ncbi.nlm.nih.gov/?term=peptide+analysis+HPLC+mass+spectrometry
- FDA — analytical methods: https://www.fda.gov/regulatory-information/search-fda-guidance-documents

### Immune peptides: LL-37 and thymosin alpha-1

- URL: https://ruskipeptidi.com/blog/immune-peptides-ll-37-thymosin/
- Category: Immunity
- Published: 2026-10-15
- Updated: 2026-11-03
- Author: RuskiPeptidi Editorial Team
- Keywords: immune peptides, LL-37, thymosin alpha-1, innate immunity, immunomodulation

What immune peptides are, how they are studied, and what research actually shows about LL-37 and thymosin alpha-1. With the limits of evidence and the regulatory context.

Key findings:
- Immune peptides act at different levels of innate and adaptive immunity.
- LL-37 is an antimicrobial peptide that acts mainly through membrane interactions and modulation of inflammation.
- Thymosin alpha-1 is a synthetic peptide with a studied effect on the T-cell response.
- Research interest is not the same as clinical approval; long-term safety in humans has not been confirmed.

Frequently asked questions:
- **Are immune peptides medicines?** Some are approved in certain countries for narrow indications, while most remain research compounds. The products in our catalogue are intended exclusively for laboratory use.
- **Can LL-37 replace antibiotics?** No. LL-37 is a research antimicrobial peptide that is not approved for treating infections in humans. Its use as a substitute for antibiotics is not justified.
- **What is the difference between thymosin alpha-1 and thymosin beta-4?** These are different peptides with different sequences and roles. Thymosin alpha-1 is associated with the immune response, while thymosin beta-4 is associated with actin and tissue repair.

Sources:
- PubMed — LL-37 and cathelicidins: https://pubmed.ncbi.nlm.nih.gov/?term=LL-37+cathelicidin
- PubMed — thymosin alpha-1: https://pubmed.ncbi.nlm.nih.gov/?term=thymosin+alpha-1
- EMA — regulatory framework: https://www.ema.europa.eu/en/human-regulatory-overview

### How to read a certificate of analysis (COA)

- URL: https://ruskipeptidi.com/blog/certificate-of-analysis-coa/
- Category: Quality
- Published: 2026-10-12
- Updated: 2026-11-03
- Author: RuskiPeptidi Editorial Team
- Keywords: certificate of analysis, peptide COA, peptide purity, HPLC, peptide quality

A practical guide through a peptide certificate of analysis: what information it must contain, what purity, identity and batch mean, and what the signs of a poor COA are.

Key findings:
- A COA is a document about a specific batch, not about the product in general.
- A credible COA states the method, result, laboratory and a link to the batch.
- A purity percentage without a method and chromatogram is weak evidence.
- Independent analysis is the strongest assurance that the data match the product.

Frequently asked questions:
- **Is a COA enough for a product to be high quality?** No. A COA is important evidence, but it can be forged or inadequate. The strongest assurance is independent analysis of a sample from the purchased batch.
- **What does a purity of 99 % mean?** It usually means that 99 % of the chromatogram area at a given wavelength belongs to the main peak. This does not cover impurities that do not absorb at that wavelength, nor water or salt content.
- **Must a COA contain a batch number?** Yes. Without a batch number, the document cannot be linked to a specific vial, so it proves nothing about the product you have in your hand.

Sources:
- FDA — guidance for analytical methods: https://www.fda.gov/regulatory-information/search-fda-guidance-documents
- ICH — validation of analytical methods: https://www.ich.org/page/quality-guidelines
- PubMed — peptide purity and analytics: https://pubmed.ncbi.nlm.nih.gov/?term=peptide+purity+analysis

### Epitalon, Thymalin and DSIP: Russian gerontology

- URL: https://ruskipeptidi.com/blog/epitalon-thymalin-and-dsip/
- Category: Longevity
- Published: 2026-10-07
- Updated: 2026-11-03
- Author: RuskiPeptidi Editorial Team
- Keywords: Epitalon, Thymalin, DSIP, gerontology, telomerase

A critical look at the Russian gerontological school: Epitalon, Thymalin and DSIP, the pineal gland, telomerase and the limitations of the available evidence.

Key findings:
- The Russian gerontological school studied peptides in relation to the pineal gland and immunity.
- Epitalon is the tetrapeptide AEDG; telomerase effects have been described mainly in vitro.
- Thymalin is a peptide preparation of thymic origin, not a single synthetic peptide.
- There is no evidence that these peptides extend life in humans.

Frequently asked questions:
- **Does Epitalon extend telomeres in humans?** There is no evidence that oral or injectable use of Epitalon would lengthen telomeres in humans and improve health. Telomerase effects have been described mainly in cell cultures.
- **Is Thymalin the same as thymosin alpha-1?** No. Thymalin is a peptide preparation of thymic origin that may contain several fractions. Thymosin alpha-1 is a synthetic peptide with a precisely defined sequence.
- **Does DSIP help with insomnia?** DSIP is not an approved medicine for insomnia. The studies are old and methodologically limited, so a clinical benefit cannot be confirmed.

Sources:
- PubMed — Epitalon: https://pubmed.ncbi.nlm.nih.gov/?term=epitalon
- PubMed — Thymalin: https://pubmed.ncbi.nlm.nih.gov/?term=thymalin
- PubMed — DSIP: https://pubmed.ncbi.nlm.nih.gov/?term=delta+sleep+inducing+peptide

### Semax and Selank: Russian nootropic peptides

- URL: https://ruskipeptidi.com/blog/semax-and-selank/
- Category: Neuroscience
- Published: 2026-09-30
- Updated: 2026-11-03
- Author: RuskiPeptidi Editorial Team
- Keywords: Semax, Selank, nootropic peptides, BDNF, Russian peptides

An overview of the Russian neuropeptides Semax and Selank: origin, proposed mechanisms, studies on BDNF and anxiety, and the limits of clinical evidence.

Key findings:
- Semax is an ACTH(4–10) analogue, and Selank is a modified tuftsin analogue.
- Preclinical studies link them to BDNF, neuroplasticity and the stress response.
- Much of the human data comes from a limited number of research settings.
- In the EU they are not approved as medicines and are no substitute for the treatment of anxiety or cognitive disorders.

Frequently asked questions:
- **Are Semax and Selank nootropics?** They are often described as nootropic peptides because they have been studied in relation to cognition and stress. The term nootropic is broad and often exaggerated in marketing; clinical evidence is limited.
- **Are they considered medicines in Russia?** In Russia they were registered for certain indications within the national regulatory system. That does not mean they are approved in Croatia or the EU.
- **Can I use them for studying?** We do not recommend human use. They are research compounds without demonstrated benefit in healthy individuals and with unknown long-term safety.

Sources:
- PubMed — Semax: https://pubmed.ncbi.nlm.nih.gov/?term=Semax
- PubMed — Selank: https://pubmed.ncbi.nlm.nih.gov/?term=Selank
- EMA — regulatory framework: https://www.ema.europa.eu/en/human-regulatory-overview

### Ipamorelin and CJC-1295: GH secretagogues

- URL: https://ruskipeptidi.com/blog/ipamorelin-cjc-1295-gh-secretagogues/
- Category: Hormones
- Published: 2026-09-23
- Updated: 2026-11-03
- Author: RuskiPeptidi Editorial Team
- Keywords: Ipamorelin, CJC-1295, GH secretagogues, growth hormone, GHRP-6

How GH secretagogues work, how Ipamorelin, CJC-1295 without DAC and GHRP-6 differ, and what studies show about growth hormone.

Key findings:
- GH secretagogues act on the pituitary axis and stimulate the body's own release of growth hormone.
- CJC-1295 is a GHRH analogue, while Ipamorelin and GHRP-6 act through the ghrelin receptor.
- The CJC-1295 version without DAC has a shorter half-life than the version with DAC.
- These are research compounds, not approved medicines; they may be prohibited in sport.

Frequently asked questions:
- **Do GH secretagogues contain growth hormone?** No. They stimulate the release of endogenous hormone from the pituitary. This is different from direct administration of recombinant growth hormone.
- **Which is stronger, Ipamorelin or CJC-1295?** A comparison without context is not meaningful. They act on different receptors and have different profiles. CJC-1295 acts through the GHRH receptor, Ipamorelin through the ghrelin receptor.
- **Are GH secretagogues prohibited in sport?** They may be. Check the current WADA list and the rules of your national anti-doping organisation, as lists are updated periodically.

Sources:
- PubMed — GH secretagogues: https://pubmed.ncbi.nlm.nih.gov/?term=ghrelin+receptor+agonist+growth+hormone
- PubMed — Ipamorelin: https://pubmed.ncbi.nlm.nih.gov/?term=ipamorelin
- WADA — prohibited substances: https://www.wada-ama.org/en/prohibited-list

### GHK-Cu: the copper tripeptide in skin research

- URL: https://ruskipeptidi.com/blog/ghk-cu-copper-tripeptide/
- Category: Regeneration
- Published: 2026-09-16
- Updated: 2026-11-03
- Author: RuskiPeptidi Editorial Team
- Keywords: GHK-Cu, copper tripeptide, collagen, elastin, skin biology

GHK-Cu is a complex of the tripeptide GHK and copper. An overview of research on collagen, elastin, wound healing and the differences between cosmetics and research use.

Key findings:
- GHK-Cu is a complex of the tripeptide Gly-His-Lys and copper(II) ions.
- In preclinical research it has been linked to collagen and elastin synthesis and to an antioxidant response.
- Much of the data comes from cell cultures; clinical evidence is limited.
- The research material is not a cosmetic product and is not intended to be applied to the skin without a protocol.

Frequently asked questions:
- **Can I use GHK-Cu as a cream?** No. The product in the catalogue is a lyophilised research material, not a cosmetic formulation. Application to the skin would require an appropriate formulation and compliance with cosmetics legislation.
- **Why is copper important?** Copper ions are part of the complex and influence its stability and biological interactions. Copper is also a cofactor for enzymes involved in collagen formation.
- **Does GHK-Cu reduce wrinkles?** Claims of a visible reduction in wrinkles go beyond the available evidence. Research points to biological mechanisms, not a confirmed cosmetic effect in humans.

Sources:
- PubMed — GHK-Cu: https://pubmed.ncbi.nlm.nih.gov/?term=GHK-Cu
- PubMed — GHK and collagen: https://pubmed.ncbi.nlm.nih.gov/?term=GHK+collagen
- PubMed — copper and collagen synthesis: https://pubmed.ncbi.nlm.nih.gov/?term=copper+collagen+synthesis

### TB-500 and thymosin beta-4: tissue regeneration

- URL: https://ruskipeptidi.com/blog/tb-500-thymosin-beta-4/
- Category: Regeneration
- Published: 2026-09-09
- Updated: 2026-11-03
- Author: RuskiPeptidi Editorial Team
- Keywords: TB-500, thymosin beta-4, tissue regeneration, actin, wound healing

What TB-500 is, how it differs from thymosin beta-4, and what preclinical research says about actin, cell migration and healing.

Key findings:
- TB-500 is a synthetic fragment of thymosin beta-4; the name does not denote a single standardised molecule.
- Thymosin beta-4 binds actin and affects cell movement, which is the basis for healing research.
- Human data on TB-500 are scarce, so clinical conclusions cannot be drawn.
- When purchasing, the exact sequence, length and analysis of the specific batch must be verified.

Frequently asked questions:
- **Is TB-500 exactly the same as thymosin beta-4?** No. TB-500 is a fragment, not the whole protein. Different manufacturers may list different fragments, so the exact sequence and molecular mass must be verified.
- **Does TB-500 help with tendons?** Preclinical models are promising, but there is no clinical evidence in humans confirming efficacy in tendon injuries. Claims of rapid healing are not substantiated.
- **How is TB-500 stored?** Store the lyophilised powder at −20 °C, protected from light and moisture. After reconstitution, keep the solution at 2–8 °C and follow the laboratory protocol.

Sources:
- PubMed — thymosin beta-4: https://pubmed.ncbi.nlm.nih.gov/?term=thymosin+beta-4
- PubMed — TB-500: https://pubmed.ncbi.nlm.nih.gov/?term=TB-500
- PubMed — thymosin beta-4 and wound healing: https://pubmed.ncbi.nlm.nih.gov/?term=thymosin+beta4+wound+healing

### BPC-157: what the research shows

- URL: https://ruskipeptidi.com/blog/bpc-157-research-overview/
- Category: Regeneration
- Published: 2026-09-02
- Updated: 2026-11-03
- Author: RuskiPeptidi Editorial Team
- Keywords: BPC-157, BPC-157 research, regenerative peptides, tendon healing, BPC-157 Croatia

An overview of preclinical research on BPC-157: proposed mechanisms, healing models, limitations of human data and the questions that should be asked.

Key findings:
- BPC-157 is a synthetic pentadecapeptide first linked to the gastric protein BPC.
- Most evidence comes from preclinical models; clinical data in humans are limited.
- Proposed mechanisms include angiogenesis, fibroblast migration and nitric oxide modulation.
- Claims of 'proven' healing in humans go beyond the available evidence.

Frequently asked questions:
- **Has BPC-157 been studied in humans?** There are a few small reports, but there are no large randomised controlled trials confirming clinical efficacy and safety. Most data come from preclinical models.
- **What is the purity of BPC-157 in the catalogue?** The description declares a purity of ≥ 99 % by HPLC, and identity is described by mass spectrometry. Check the COA of the specific batch at the source.
- **Is BPC-157 safe?** Long-term safety in humans has not been established. As it is not an approved medicine, any use outside a controlled trial involves uncertainty, so professional assessment is required.

Sources:
- PubMed — BPC-157: https://pubmed.ncbi.nlm.nih.gov/?term=BPC-157
- PubMed — BPC-157 and angiogenesis: https://pubmed.ncbi.nlm.nih.gov/?term=BPC-157+angiogenesis
- HALMED — medicines legislation: https://www.halmed.hr/

### What are peptides? A guide for researchers

- URL: https://ruskipeptidi.com/blog/what-are-peptides/
- Category: Basics
- Published: 2026-08-18
- Updated: 2026-11-03
- Author: RuskiPeptidi Editorial Team
- Keywords: what are peptides, peptide bond, research peptides, amino acids, peptides Croatia

Peptides are short chains of amino acids with diverse biological roles. This guide explains structure, mechanism, types, research limitations and the importance of purity.

Key findings:
- A peptide is a chain of amino acids linked by peptide bonds; the boundary between peptide and protein is conventional, not absolute.
- Peptides act as signalling molecules, hormones, antimicrobial substances or building blocks, and their effect depends on receptors and context.
- Research peptides (RUO) are not medicines; purity, identity and batch traceability are prerequisites for meaningful research.
- Preclinical results in animals or cells do not transfer automatically to humans.

Frequently asked questions:
- **Are peptides the same as proteins?** They are not the same, although they are chemically related. Peptides are shorter amino acid chains, while proteins are longer and usually adopt a complex tertiary structure. The boundary is conventional and not biologically absolute.
- **Are peptides safe?** Peptides are not a single category. Some are approved medicines with a known safety profile, others are research compounds without clinical data. Safety depends on the specific molecule, dose, route of use and the individual.
- **Are peptides steroids?** No. Peptides are amino acid chains, whereas steroids are lipid molecules with four rings. They differ in structure, mechanism of action and regulatory status.
- **Where can I find reliable information about peptides?** Primary sources are PubMed, regulatory documents (EMA, HALMED, FDA) and peer-reviewed studies. For every claim, check whether it concerns cells, animals or humans, and who funded the study.

Sources:
- PubMed — review of the basics of peptide biology: https://pubmed.ncbi.nlm.nih.gov/?term=peptide+biology+review
- EMA — human medicines: https://www.ema.europa.eu/en/human-regulatory-overview
- HALMED — access to medicines and research use: https://www.halmed.hr/


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