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
Every current seller, ranked by independent evidence — Merit Score, latest COA purity, and live $/mg (size-normalized). Prices refresh daily. Rankings are never paid.
Top Merit pick
Highest Merit Score (89) of 1 scored sellers
$99.00 · 10mg · 99.7% purity
Average price
$9.90/mg
Sellers
1
45-day trend
0%
1 of 1 sellers have a current price
- 🇺🇸 Peptidology89
✓ verified at source · 23h ago
$9.90/mg 0% vs avg$99.00
10mg
Prices observed from public storefronts (last 24h), normalized to $/mg. "Evidence" is Merit's 0–100 Merit Score, derived only from observable verification evidence (methodology on /about); "Purity" is the latest independent COA. Some buy links are affiliate links — Merit may earn a commission at no extra cost to you, and where a vendor offers one, the code shown gets you a discount at their checkout. Affiliate status never affects price data, ranking, or the Merit Score (full policy on /disclosure). Research use only.
Watch Thymosin Alpha-1 + Thymulin
Get one email when the market actually moves — no newsletter, no noise.
About Thymosin Alpha-1 + Thymulin
CAS
—
Molecular formula
—
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
Study · 2026
Zinc Coordination by Thymosin β4: Structural Determinants and Functional Implications
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 · 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 · 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.