Thymulin
Zinc-dependent thymic hormone involved in T-cell maturation and immune regulation. Physician practice use for immune modulation, autoimmune conditions, and infection recovery. Requires adequate zinc as cofactor for biological activity.
Thymulin (formerly Facteur Thymique Sérique) is a nonapeptide hormone produced by thymic epithelium requiring zinc as an essential cofactor for biological activity. It plays a central role in T-lymphocyte differentiation — the process by which naive T-cells acquire their functional identity in the thymus.
Thymic function declines with age, correlating with reduced thymulin secretion and impaired T-cell output. This thymic involution is associated with immune senescence — the gradual deterioration of immune function associated with aging. Research in thymic peptides explores whether exogenous supplementation can support immune function as the thymus ages.
Physician practice use spans acute infection support (5–10 mg daily for 7–10 days) and chronic autoimmune contexts (lower doses over months). Joseph pairs thymulin with Thymosin Alpha-1 for complementary thymic immune modulation. Zinc adequacy is assessed before starting.
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Thymulin is not FDA-approved for any indication. Research use only. Zinc adequacy should be assessed before use — deficiency may reduce efficacy. Long-term safety in humans not established. Not WADA-prohibited. All information for educational reference only.