Thymic Peptide Bioregulator / Cytomedine Class / Khavinson Immunomodulatory Research Compound
Thymalin — Thymus Peptide Bioregulator Research
Thymalin is a thymus gland polypeptide extract developed within Vladimir Khavinson's cytomedine research program at the St. Petersburg Institute of Bioregulation and Gerontology. Like epithalamin (pineal) and Cortagen (brain cortex), thymalin is a complex polypeptide preparation — an aqueous extract of bovine thymus gland tissue — rather than a single defined peptide sequence. It is distinguished from Vilon (Lys-Glu, KE dipeptide), which is the synthetic dipeptide equivalent developed from thymic tissue that represents the minimal active bioregulator unit. Both thymalin and Vilon are studied in models of thymic immune function, T-cell subset regulation, age-related immune decline (immunosenescence), and long-term neuroendocrine balance. In the Khavinson longitudinal studies, thymalin was administered to older adults in multi-year protocols alongside epitalon (pineal AEDG) with published mortality and biomarker outcomes. This page covers thymalin's research context and its relationship to Vilon and the broader cytomedine program. Research use only.
Compound identity
- Name
- Thymalin — Thymus Peptide Bioregulator (Khavinson Research)
- Class
- Thymic Peptide Bioregulator / Cytomedine Class / Khavinson Immunomodulatory Research Compound
- Also known as
- thymalin, thymus peptide bioregulator, Khavinson thymalin, thymus bioregulator, thymic peptide bioregulator, thymic extract peptide, thymic polypeptide, thymalin immune research, thymus gland peptide, thymic cytomedine, thymus bioregulator peptide
Research context
Thymalin occupies the thymic branch of Khavinson's cytomedine series — the same conceptual framework that produced Epitalon (from pineal epithalamin), Cortagen (from brain cortex), and Cardiogen (from heart tissue). The thymus gland's role as the primary organ of T-cell maturation and immune education makes it a natural source for peptide bioregulators with immunomodulatory research applications. Thymalin's composition is polypeptide — a complex mixture of thymic peptides in an aqueous extract, including Vilon (KE) as one constituent among several. In contrast, Vilon is the synthesizable dipeptide Lys-Glu (KE), isolated and characterized by Khavinson's group as a candidate for the active bioregulator moiety. Researchers requiring batch-to-batch standardization typically work with Vilon (single defined sequence, COA-verifiable); researchers studying the full native extract use thymalin.
The most-cited thymalin research comes from Khavinson's own longitudinal studies, particularly a series of studies following institutionalized elderly subjects administered thymalin + epitalon over multi-year periods. Published data from these studies reported significant reductions in mortality rate relative to untreated controls and favorable changes in immune parameters (T-cell counts, NK cell activity) and neuroendocrine markers (cortisol/melatonin ratios) over 6–12-year follow-up periods. These findings are cited extensively in the longevity peptide literature; independent replication in controlled Western clinical trials is limited. Researchers should apply appropriate epistemic standards: the effect sizes in these studies are large and the follow-up extraordinary, but the studies involve a specific institutionalized population and a complex multi-peptide protocol (typically thymalin + epitalon in combination), making single-compound attribution difficult.
In vitro and in vivo research applications for thymalin and Vilon (KE) include: T-cell proliferation and differentiation assays, NK cell cytotoxicity assays, thymic involution models in aged rodents, IL-2 and IL-7 signaling studies (both are critical for thymic T-cell development), and thymopoiesis models. Vilon (KE dipeptide) is the more accessible research form — fully synthetic, COA-verifiable, stable lyophilized. Thymalin extract is available for researchers requiring the full thymic bioregulator preparation. DMV Research carries both Vilon (KE) and thymalin as separate research compounds. Research use only.
Frequently asked questions
What is thymalin and how does it differ from Vilon (KE dipeptide)?+
Thymalin is a polypeptide bioregulator extract from bovine thymus gland tissue — a complex mixture of thymic peptides, not a single defined sequence. Vilon is the synthetic dipeptide Lys-Glu (KE) developed by Khavinson's group as the minimal active moiety of the thymic bioregulator. Thymalin is the natural extract; Vilon is the standardizable synthetic equivalent. Both are studied in immune models. Research use only.
What is the Khavinson cytomedine series and where does thymalin fit?+
The cytomedine series is a program of organ-specific peptide bioregulators developed by Professor Vladimir Khavinson's group (St. Petersburg Institute of Bioregulation and Gerontology). Each cytomedine is derived from a specific organ (pineal → epithalamin/Epitalon, thymus → thymalin/Vilon, brain cortex → Cortagen/AEDP, heart → Cardiogen/AEDR, pineal/brain → Pinealon/EDR). Thymalin is the thymus branch of this series. All are research use only.
What immune research contexts use thymalin or Vilon?+
Research applications include: T-cell proliferation and differentiation assays, NK cell cytotoxicity models, thymic involution studies in aged rodents, IL-2/IL-7 signaling studies, and thymopoiesis research. Khavinson's longitudinal studies reported thymalin administration in elderly subjects associated with reduced mortality and improved immune parameters over multi-year follow-up; independent replication in controlled Western trials is limited. Research use only.
What is thymalin's peptide composition?+
Thymalin is a polypeptide extract — not a single defined sequence. It contains a mixture of thymic peptides, with Vilon (Lys-Glu, KE dipeptide) as one identified constituent. Because it is an extract, batch standardization differs from single-peptide synthesis. Researchers requiring defined-sequence standardization use Vilon (KE); researchers studying the complete natural thymic bioregulator preparation use thymalin. Research use only.
Research use only
All products are intended for laboratory and research use only (RUO) and are not for human consumption, ingestion, or any in-vivo use.
The statements on this page have not been evaluated by the FDA. Thymalin — Thymus Peptide Bioregulator (Khavinson Research) is not intended to diagnose, treat, cure, or prevent any disease. Content is provided for laboratory research reference only.