Not FDA-approved (used in Russia)Thymus peptide extractImmune research
Thymalin
Thymalin is a polypeptide extract of calf thymus used in Russia; it is not approved in the US.
What is Thymalin?
Thymalin is a polypeptide extract of calf thymus used in Russia; it is not approved in the US. Thymalin is not approved by the FDA (used in Russia); products sold online in the US are labeled for research use only.
Key takeaways
- Thymalin is not approved by the FDA (used in Russia); products sold online in the US are labeled for research use only.
- PubMed indexes 234 papers on Thymalin (12 tagged as clinical trials) as of October 19, 2026.
- 16 vendors in our directory listed Thymalin in their public catalog on October 19, 2026.
Structure
Regulatory & access status
Thymalin is not approved by the FDA (used in Russia); products sold online in the US are labeled for research use only.
Sellers that market unapproved peptides for human use can receive FDA warning letters; our vendor directory links any letter we found on fda.gov.
How much research exists on Thymalin?
PubMed indexes 234 papers mentioning Thymalin in the title or abstract, 6 of them from the last five years and 12 tagged as clinical trials (search run October 19, 2026; repeat the search).
Most relevant recent papers
- Peptides and Ageing. — Neuro Endocrinol Lett, 2002 · review
- Thymalin: Activation of Differentiation of Human Hematopoietic Stem Cells. — Bull Exp Biol Med, 2020
- [Geroprotective effect of thymalin and epithalamin]. — Adv Gerontol, 2002 · review
- The Influence of KE and EW Dipeptides in the Composition of the Thymalin Drug on Gene Expression and Protein Synthesis Involved in the Pathogenesis of COVID-19. — Int J Mol Sci, 2023
- Reparative osteogenesis in mandible in cases of filling a bone defect with hydroxyapatite-containing osteotropic material and injecting the surrounding soft tissues with thymalin: experimental and morphological study. — Wiad Lek, 2024
- Expression features of T-lymphocytes, B-lymphocytes and macrophages in the post-traumatic regenerate of the mandible rats under conditions of filling a bone defect with hydroxyapatite-containing osteotropic material and thymalin injecting the surrounding soft tissues. — Pol Merkur Lekarski, 2024
What the evidence does not show
- Paper counts measure research attention, not whether Thymalin works or is safe.
- No FDA review of any "research use only" product's identity, purity, sterility or dose.
Research suppliers that list Thymalin
16 vendors in our directory listed a product matching Thymalin in their public catalog on October 19, 2026. Listed alphabetically; a listing is not an endorsement. Research use only.
- Atomik Labz
- Biotech Peptides
- Bulk Peptide Supply
- Core Peptides
- Eros Peptides
- Evolve BioPep
- Ion Peptide
- NuScience Peptides
- Paramount Peptides
- Peptide Crafters
- Peptide Worldwide
- Polaris Peptides
- San Diego Peptides
- Science.bio
- Southern Aminos
- Verified Peptides
Prices per mg, where we could verify them, are on our price comparison.
Thymalin reconstitution math
Lab arithmetic only, not dosing guidance: use the peptide calculator to turn a vial size and diluent volume into a concentration.
Thymalin FAQ
Is Thymalin FDA-approved?
Thymalin is not approved by the FDA (used in Russia); products sold online in the US are labeled for research use only.
Is Thymalin safe?
Safety data come from the published studies listed on this page; read them in full. Products sold as "research use only" have no FDA review of their purity, sterility or dose.
How much research is there on Thymalin?
PubMed indexes 234 papers on Thymalin (12 tagged as clinical trials) as of October 19, 2026.
Who sells Thymalin?
Atomik Labz, Biotech Peptides, Bulk Peptide Supply, Core Peptides, Eros Peptides, Evolve BioPep and 10 more listed it on their public catalogs when we checked; a listing is not an endorsement.
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