Encyclopedia

Thymalin

Thymalin is a thymus-derived peptide preparation from the Khavinson bioregulator family, reported to act as an immunomodulator that helps normalize T-cell populations. Its precise molecular mechanism stays poorly defined in peer-reviewed Western literature, and it is not FDA-approved in the US, where it carries research-chemical status. Below you'll find reported dosing, reconstitution, safety, and legal status. Educational only, not medical advice.

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Category	Immune
Regulatory status	Not FDA-approved in the US (research chemical status).

Mechanism

A thymus-derived peptide preparation (one of the Khavinson bioregulators) reported to act as an immunomodulator that helps normalize T-cell populations and immune function; the precise molecular mechanism is not well defined in peer-reviewed Western literature.

Half-life

Not established; limited human pharmacokinetic data.

Regulatory status

Not FDA-approved in the US (research chemical status). Registered as a medicinal immunomodulatory drug in the Russian Federation, where it has long clinical use; no US marketing authorization.

Safety

Reported as generally well tolerated in Russian clinical use, but independent Western safety data are lacking; sterility/purity risks apply to unregulated sourced product.

Evidence

Human use and studies primarily from Russia (including a long-term elderly cohort); no independent Western randomized controlled trials published. Evidence quality is limited.

Sources

Khavinson V, Morozov V. Peptides of pineal gland and thymus prolong human life. Neuroendocrinol Lett. 2003;24(3-4):233-240. https://pubmed.ncbi.nlm.nih.gov/14523363/
Kuznik B, Khavinson V, et al. Peptide Drug Thymalin Regulates Immune Status in Severe COVID-19 Older Patients. Adv Gerontol. 2021;11(4):368-376. https://pmc.ncbi.nlm.nih.gov/articles/PMC8654498/
Khavinson VKh, et al. Thymalin: Activation of Differentiation of Human Hematopoietic Stem Cells. Bull Exp Biol Med. 2020;170(1):118-122. https://pubmed.ncbi.nlm.nih.gov/33237528/
Morozov VG, Khavinson VKh. Natural and synthetic thymic peptides as therapeutics for immune dysfunction. Int J Immunopharmacol. 1997;19(9-10):501-505. https://pubmed.ncbi.nlm.nih.gov/9637345/
Zhukova GV, et al. Effect of Thymalin on the Tumor and Thymus under Conditions of Activation Therapy In Vivo. Bull Exp Biol Med. 2018;165(1):80-83. https://pubmed.ncbi.nlm.nih.gov/29797130/

PepWise is an informational and educational tracking tool, not medical advice and not a medical device. Thymalin may be experimental, restricted, or prescription-only; many research peptides are not FDA-approved. Consult a licensed healthcare provider before starting, changing, or stopping any protocol. Operated by STC Consulting, Inc.