Thymalin
Thymic Extract · Тималин
Thymalin is the pharmaceutical thymus polypeptide extract - Cytamin-era injectable used in CIS practice. It is not Vilon, not Thymogen, not thymosin alpha-1, and not a single CAS-numbered tetrapeptide.
Use-case scores
0–10 against the evidence we have, not a gym ranking. Hidden domains do not apply here.
- Longevity / aging3.5/10
Khavinson-school tissue peptide. Single-lab concentration after haircut. Not a Western Phase 3 geroprotector.
- Immune3.5/10
Thymus/immune organ map in the school. Not Zadaxin and not a US immune-deficiency drug.
Compound card
- Sequence
- Thymus extract / historic clinic SKU
- Class
- Khavinson pharmaceutical extract (Thymus)
- Formula
- Mixture of thymic peptides (<10 kDa)
- Status
- Not FDA-approved · research use
How it works
Thymalin is a thymic bioregulator peptide developed by Professor Vladimir Khavinson at the St. Petersburg Institute of Bioregulation and Gerontology. It consists of a standardized extract from the thymus gland containing small regulatory peptides (molecular weight <10 kDa).
Thymalin restores thymic function in aging immune systems by promoting T-cell differentiation, maturation, and activation. The thymus involutes significantly after puberty - by age 60, most thymic tissue has been replaced by fat. Thymalin works by restoring thymic peptide signaling, rebooting T-cell production. A Khavinson-group elderly follow-up of thymic extract plus epithalamin/epitalon is the paper people mean when they say 12-year mortality. That is a concentrated Russian series, not a US mortality indication, and it is not a license to treat immunodeficiency from this page.
Source: PMID: 15677927
Khavinson map
Canonical 41Used in bioregulator stacks
Manufacturer-style organ combinations - not FDA protocols. Every name is a live leaf.
The Khavinson school
Vladimir Khatskelevich Khavinson (1946–2024) spent five decades at what became the St. Petersburg Institute of Bioregulation and Gerontology arguing a simple, stubborn idea: aging is, in part, a failure of tissue-specific peptide signals, and those signals can be restored. The first products were not “peptides” in the Instagram sense. They were Cytamins - polypeptide fractions isolated from a named organ of young animals. Later commercial refinements of those fractions are sold as Cytomaxes (Cytomed / NPCRIZ): still mixtures, still oral capsules, still defined by the source organ rather than a single sequence. When the group identified short active motifs inside those mixtures, they synthesized them as Cytogens - di-, tri-, and tetrapeptides with a one-letter code (KE, AEDG, KED, EDR, KEDP, and so on).
That three-layer stack is the whole map. Cytamin / pharmaceutical extracts (Thymalin, Epithalamin, Cortexin, Retinalamin, Prostatilen) are the clinic-era injectables registered in the former Soviet pharmacopeia. Cytomaxes are the capsule complexes Cytomed still lists as a 21-SKU organ line. Cytogens are the defined synthetics. English-language educators, including Brenden Henry’s public writing at Peptide Science Institute, add a further commercial distinction - later analog SKUs (N-acetyl, amidate, “V2” complexes) sold as more stable or more diverse than the original Cytomed lots. That last layer is a product taxonomy, not a Khavinson paper. We describe it so readers are not gaslit by three bottles with the same organ name. We do not reproduce paid Peptide Mastery protocols, Precision Cell Method language, or anyone else’s course IP.
Full Cytamin → Cytomax → Cytogen map, literature limits, and how we counted 41
The mechanism Khavinson published is epigenetic, not receptor-agonist in the GLP-1 sense. Short peptides are claimed to enter nuclei, interact with DNA/histones, and reopen tissue-specific transcription that condensed with age (heterochromatin → euchromatin). Reviews in the Bulletin of Experimental Biology and Medicine and Neuroendocrinology Letters (PMID 14523363, 15677927, 23888677) are the citable core. Complementary GI pharmacology is not mystical: di- and tripeptides are PEPT1/LAT substrates, which is why oral capsules are even a conversation. What is not established in Western Phase 3 programs is organ-by-organ disease treatment, telomere reversal as a clinical endpoint, or the manufacturer claim that Cytomax is “a third stronger” than Cytogen. Those are NPCRIZ marketing sentences.
Khavinson’s group published hundreds of papers, many in Russian, many in the same journal family. That is a real literature. It is also a literature with limited independent Western replication, small n, and a habit of using one review PMID as a stamp on every organ. On this site a leaf earns its organ story, its Cytomax↔Cytogen pair, its sequence if it has one, and an honest sentence about what has not been shown. Reconstitution math belongs on cytogens sold as vials. Cytomax capsules do not get a fake 5 mg vial.
The 41 we treat as canonical are the 21 Cytomaxes on the public e-peptide/Cytomed list, the 12 Cytogens on that same commercial line (including Vesilut, which Western catalogs often drop), plus eight historically load-bearing molecules that sit beside the capsule SKUs: Epitalon, Vilon, Thymogen, Livagen, Cortagen, Prostamax, Thymalin, and Epithalamin. Honluten, Cortexin, Retinalamin, Prostatilen, Thymulin, N-acetyl-epitalon-amidate, Pinalex, and the GPL Man / GPL Femme kits are covered as adjacent - same school or same storefront, not padded into a fake 41.
Public English-language teaching (including Brenden Henry at peptidescienceinstitute.com) is cited as context, not copied. Paid Peptide Mastery / Peptide Salvation text stays theirs.
History of this molecule
This is the immune extract that actually behaved like a hospital product: ampoules, courses, geriatric and infectious-disease use in Russian-language literature. Vladonix is the later oral Cytomax complex from the same organ. The cytogens are the defined motifs.
English blogs credit Thymalin+Epitalon combinations with mortality reduction in elderly cohorts. Read the papers for which preparation, which dose, which control. Do not sell that as a US indication.
TA-1 (Zadaxin) is a 28-mer with a separate development path. TB-500 is a thymosin-β4 fragment. Neither is Thymalin.
Caveats
Mixture product: lot fingerprint, animal source, no single sequence. Autoimmune caution. Not TA-1.
Full 41-map: Khavinson bioregulators index · Bioregulator stacks
Goal context
Thymic extract, not Tα1
Thymalin is the extract-era product in the Thymus line, not a Cytomax capsule and not thymosin alpha-1. Russian clinic history is real. A 50% mortality slogan is not a US label.
Often paired with Epitalon in school folklore
Different organs and different materials: thymic extract vs pineal tetrapeptide. School combination follow-ups exist. That is not an FDA mortality claim.
Research Use Cases
- ✓Thymic extract identity vs Vilon vs Vladonix vs thymosin alpha-1
- ✓Not a post-cancer immune restoration or infection protocol
- ✓Not a US mortality-reduction drug
Dosing
| Phase | Dose | Frequency | Notes |
|---|---|---|---|
| Khavinson Protocol | 10 mg | Daily IM or SC for 10 consecutive days | Standard Khavinson immune reconstitution protocol. Repeat 1-2 times per year. Often paired with Epitalon cycles. |
Administration
Thymalin: CIS IM extract vs Not Vladonix / not KE
- Clinic-era registered presentation in CIS practice. Real hospital object, not a blog tetrapeptide.
- Mixture by design (Cytamin-era). That is the point of the extract layer.
- Food does not change an IM shot.
- Not Vilon (KE), not Thymogen (EW), not Crystagen (EDP), not Thymulin (FTS), not TA-1 (Zadaxin), not TB-500.
- Lot fingerprint, animal source, no single CAS. Autoimmune caution.
- Do not paste a 5 mg BAC chart from a cytogen vial onto this ampoule.
- The map has an oral thymus product (Vladonix). Use that leaf for capsules.
- Keeps extract identity from collapsing into KE milligrams.
- Not a sublingual tablet. Nobody manufactures this SKU that way.
- English catalogs flatten Thymalin / Vilon / Vladonix into one “thymus peptide.”
- Combination longevity follow-ups that blogs call “Thymalin+Epitalon” must be read for which preparation was injected.
- Not a sublingual immune melt.
Timeline
Who it is for
Immune Reconstitution / Thymic Support
ModerateThymic extract in the Khavinson school. Not thymosin alpha-1. Mortality slogans are not a label.
Longevity / Anti-Aging
ModerateSchool combination follow-up, not an FDA mortality claim.
Reconstitution
Safety & Considerations
Used in Russian and CIS clinic programs for decades. That history is not a US safety NDA. IM or SubQ. "No significant adverse events" is that literature, not a Western Phase 3 file.
Regulatory & Legal Status
Approved in Russia as Tactivin®; not FDA-approved
Not currently on the WADA 2026 Prohibited List. Policies may change - verify before competition.
Research Chemical
US Compounding: Not eligible / not available
⚠️ This information is for educational purposes only and may not reflect the most current regulatory updates. Always verify with official FDA, WADA, and jurisdiction-specific sources before use.
Limits of current evidence
- Extract ≠ synthetic cytogen ≠ Cytomax capsule.
- Longitudinal Khavinson combination data is not an FDA mortality claim.
- This site will not treat the named organ disease from a peptide page.
Human evidence
Moderate · Khavinson-school extract (not a US NDA)
- Extract ≠ synthetic cytogen ≠ Cytomax capsule.
- Longitudinal Khavinson combination data is not an FDA mortality claim.
Verdict
Thymalin is the extract-era product in the Thymus line, not a Cytomax capsule and not a one-letter cytogen. Russian clinic history is real. A 50% mortality slogan is not a US label.
Interactions & Contraindications
Immunosuppressants and transplant belong with a prescriber. Annual 10-day cycles are the school’s language, not an FDA duration.
Synergies & Common Stacks
School combination follow-ups exist. They are not a 12-year 50% mortality NDA on this extract.
Extract vs defined 28-mer. Same organ story, different material.
Appears in goal guides
Goal guides are maps, not clinic protocols. A mention here is not a treatment plan.
Immune Resilience & Post-Viral Stack
Thymosin α1 and Thymalin identity. Zadaxin is not a US NDA. This is not a viral-pathogenesis or thymic-regeneration treatment page.
Cellular Redox & DNA Integrity
Khavinson-style 10-day intensive: Epitalon, Thymalin (injectable), and Pinealon, then a long off. Autophagy supplements named, not stocked as peptides.
Frequently Asked Questions
Thymalin vs Vladonix vs Vilon vs TA-1?▼
Single sequence?▼
15-year longevity study?▼
Reconstitution?▼
How does Thymalin relate to Epitalon?▼
What is the Thymalin protocol?▼
References
- Khavinson VKh, Morozov VG “Peptide regulation of aging: from experimental studies to clinical practice.” Advances in Gerontology (2003). PMID: 14523363
- Khavinson VKh, Anisimov VN “Peptide bioregulators: a new class of geroprotectors. Message 1: results of experimental studies.” Bulletin of Experimental Biology and Medicine (2000). PMID: 11182816
- Khavinson VKh et al. “Tissue-specific effects of peptides.” Bulletin of Experimental Biology and Medicine (2005). PMID: 15677927
- Khavinson VKh, Lin’kova NS, Tarnovskaya SI “Short peptides regulate gene expression.” Bulletin of Experimental Biology and Medicine (2013). PMID: 23888677
- Khavinson VK, et al. “Thymic peptides in the treatment of cancer.” Int J Immunopharmacol (2000). PMID: 11137612
- Khavinson VK, Morozov VG. “Peptide bioregulators: a new class of geroprotectors.” Bull Exp Biol Med (2000). PMID: 10977940
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