Thymosin Alpha-1 + Thymulin
Also known as: Ta1 + Thymulin blend, Thymic peptide immune blend
Pre-mixed blend of two thymus-derived immune-modulating peptides. Thymosin Alpha-1 is a 28-amino-acid peptide that activates Toll-like-receptor signaling and promotes T-cell maturation and a Th1-skewed immune response; it is marketed abroad as Zadaxin and approved in numerous countries but is not FDA-approved in the United States. Thymulin is a 9-amino-acid, zinc-dependent thymic peptide that supports upstream T-cell maturation and helps balance cytokine output, partly via NF-kB modulation. There is no controlled human efficacy or safety data for this specific combination; the blend is sold as a research-only / grey-market product and the rationale is inferred from the individual peptides.
Who's worth your money for Thymosin Alpha-1 + Thymulin
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Top Merit pick
Highest Merit Score (89) of 1 scored sellers
$89.10 · 10mg · 99.7% purity
Average price
$8.91/mg
Sellers
1
45-day trend
-9.5%
1 of 1 sellers have a current price
- 🇺🇸 Peptidology89
✓ verified at source · 3d ago · stale
$8.91/mg 0% vs avg$89.10
10mg
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About Thymosin Alpha-1 + Thymulin
CAS
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Molecular formula
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Typical dose range
Vendor-dependent; component norms: Thymosin Alpha-1 ~1.6 mg subcutaneous 2x/week (Zadaxin reference); Thymulin variable in research contexts. No validated combination dosing exists.
Half-life
Thymosin Alpha-1: ~2 hours; Thymulin: short, not well characterized in humans
Common research uses
Safety notes
Not FDA-approved in the US; sold as a research-only / grey-market blend. Thymosin Alpha-1 is approved as a drug (Zadaxin) in other countries but not as this combination. Thymulin's activity depends on adequate zinc status. No combination-specific human safety data. Not evaluated by WADA as a blend.
Reconstitution
Reconstitute lyophilized powder with bacteriostatic water; refrigerate after reconstitution.
COAs for Thymosin Alpha-1 + Thymulin
1 third-party test across 1 vendor. Each card links to the full report.
4 citations indexed for Thymosin Alpha-1 + Thymulin
animal · 2026
Zinc Coordination by Thymosin β4: Structural Determinants and Functional Implications
Thymosin β4 (Tβ4) is a highly acidic, intrinsically disordered 43-amino-acid peptide with diverse biological functions, yet its interactions with metal ions remain poorly understood.
review · 1992
Thymic endocrinology
Thymus endocrinology is characterized by the action of various hormones on the thymus endocrine milieu consisting of thymocytes, thymic epithelial cells and thymic stromal cells.
review · 1992
Thymic involution in aging. Prospects for correction
The thymus produces several putative thymic hormones: thymosin alpha 1, thymulin, and thymopoietin, which have been reported to circulate and to act on both prothymocytes and mature T cells in the periphery, thus maintaining their commitment to the T cell system.
review · 1985
Thymic peptide hormones: basic properties and clinical applications in cancer
The manuscript will provide an in-depth and critical review of the nomenclature, biochemistry, biological properties, and a summary of published and on-going clinical trials with all reported thymic preparations, including both partially purified thymic factors (e.g., thymosin fraction 5, thymostimulin) as well as puri…
Research use only. Not for human consumption and not approved by the FDA. Nothing here is medical advice.