About Thymulin
Zinc-dependent peptide that promotes T-lymphocyte differentiation, enhances natural killer cell activity, and regulates cytokine balance. Requires zinc cofactor for biological activity.
Thymulin (facteur thymique serique; FTS) is an endogenous zinc-dependent nonapeptide (Glu-Ala-Lys-Ser-Gln-Gly-Gly-Ser-Asn) produced exclusively by thymic epithelial cells, identified by Dardenne and Bach in the 1970s as the circulating thymic hormone responsible for promoting T-cell differentiation and maturation in the peripheral immune system. Biological activity of thymulin requires chelation of a zinc ion to form an active complex; the zinc-thymulin complex binds to receptors on immature T-lymphocytes promoting their differentiation, and modulates the neuroendocrine-immune axis through interactions with pituitary hormones, with blood levels of active thymulin declining measurably with age and zinc deficiency. Published reviews from the Dardenne (Institut Pasteur) and Goya groups have established thymulin as a key mediator of thymic-dependent immune senescence, with preclinical data in aged animal models demonstrating partial restoration of immune function following exogenous administration; no human randomized controlled trials have been published. Thymulin has no FDA approval and no approved therapeutic indication in any major jurisdiction; it is a research compound with biological plausibility for immune senescence applications, though the exclusively preclinical evidence base and the zinc-dependency of its active form represent important limitations for any discussion of exogenous supplementation.
Thymulin Benefits & Research Areas
Regulatory & Evidence
Risk Profile
Generally considered lower risk in research contexts. Risk profile varies by individual — review contraindications before use.
Regulatory Status
- Availability Status
- Research Only
Regulatory status reflects publicly available information and may change. This is not legal or medical advice.
Research Sources
2 sources cited · 2 moderate
1 Review · 1 Animal
The thymus-neuroendocrine axis: physiology, molecular biology, and therapeutic potential of the thymic peptide thymulin
Annals of the New York Academy of Sciences · 2009
This review summarizes evidence that thymulin (FTS), a zinc-dependent thymic nonapeptide, regulates intrathymic and extrathymic T cell differentiation, possesses anti-inflammatory and analgesic properties in the brain, and shows promise in adenoviral gene therapy models for sustaining long-term expression without immune destruction of transduced cells.
In vivo treatment with a nonapeptide thymic hormone, facteur thymique serique (FTS), ameliorates chronic colitis induced by dextran sulphate sodium in mice
International Immunopharmacology · 2007
Research in a mouse model found that daily subcutaneous thymulin (FTS) significantly reduced lethality, weight loss, and histological inflammation in chronic DSS-induced colitis, associated with decreased interferon-gamma and proinflammatory interleukin levels and increased IL-10 production in lamina propria cells, demonstrating anti-inflammatory immunomodulatory activity.
Thymulin Side Effects & Safety Considerations
Generally considered lower risk in research contexts. Individual response varies — review all considerations before use.
Reported contraindications & considerations
Consult a qualified healthcare professional before making any health decisions. This information is educational only and does not constitute medical advice.
Where to Buy Thymulin — Providers & Availability
26 providersClinics
10 providersiLIFE Anti-Aging Center
United StatesView →Optimize by JaeNix
United StatesView →PROVOKE Health
United StatesView →Vitále IV Clinic
United StatesView →AgeRejuvenation
United StatesView →Premier TRT
United StatesView →VitalRenew Functional & Integrative Medicine
United StatesView →Philadelphia Integrative Medicine
United StatesView →Optimal T Functional Health
United StatesView →Functional Medicine
United StatesView →
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Questions to Ask Your Provider
Frequently Asked Questions — Thymulin
Thymulin (facteur thymique serique; FTS) is an endogenous zinc-dependent nonapeptide (Glu-Ala-Lys-Ser-Gln-Gly-Gly-Ser-Asn) produced exclusively by thymic epithelial cells, identified by Dardenne and Bach in the 1970s as the circulating thymic hormone responsible for promoting T-cell differentiation and maturation in the peripheral immune system. Biological activity of thymulin requires chelation of a zinc ion to form an active complex; the zinc-thymulin complex binds to receptors on immature T-lymphocytes promoting their differentiation, and modulates the neuroendocrine-immune axis through interactions with pituitary hormones, with blood levels of active thymulin declining measurably with age and zinc deficiency.
immune modulation, T-cell maturation, NK cell support, anti-inflammatory.
Research on Thymulin primarily documents effects related to immune modulation and T-cell maturation and NK cell support and anti-inflammatory. These are areas covered in preclinical and clinical literature — individual response varies and effects depend on context of use.
Reported contraindications and considerations for Thymulin include active cancer history, pregnant or nursing. This is educational information only — consult a qualified healthcare professional before use.
26 providers in the directory currently offer Thymulin.
This review summarizes evidence that thymulin (FTS), a zinc-dependent thymic nonapeptide, regulates intrathymic and extrathymic T cell differentiation, possesses anti-inflammatory and analgesic properties in the brain, and shows promise in adenoviral gene therapy models for sustaining long-term expression without immune destruction of transduced cells.