Buy Thymosin Alpha-1 in the USA

Every Thymosin Alpha-1 lot we ship is validated by Janoshik Analytical via HPLC and mass spectrometry. The corresponding Certificate of Analysis is referenced from the product page so researchers can verify the exact batch they received. We do not ship without an in-hand COA.

Orders placed before 2 PM ET ship the same day from our New York research-supply facility. Free shipping is included on orders over $200, and every order includes batch-specific COA documentation.

Thymosin Alpha-1 (Tα1 / Thymalfasin / Zadaxin) is a synthetic 28-amino-acid peptide identical to a naturally occurring thymic hormone. It is one of the most extensively studied immune-modulation peptides in the world — approved in 35+ countries with a safety record of <1% serious adverse events across 11,000+ patients.

Recent 2024–2025 research in advanced solid-tumor cancer patients showed a 7-day loading dose increased total T cells from 422.5/μL to 614.0/μL (P<0.001), with significant elevations in CD4+ and CD8+ subsets. Studied for immune recovery, enhanced vaccine responses (elderly, hemodialysis patients), viral infections, and adjunct cancer research. For research use only. Not for human or veterinary consumption.

Researchers should refer to peer-reviewed publications for primary sources on this compound. Thymosin Alpha-1 is sold strictly for laboratory research use and is not intended for human or veterinary use.

Lyophilized Thymosin Alpha-1 stores at −20 °C protected from light; reconstituted solution refrigerates at 2–8 °C per laboratory SOP. Reference your lot's COA for compound-specific guidance and see our [Preparation Guide](/learn/preparation-guide) for laboratory handling instructions.

BioInfinity ships Thymosin Alpha-1 same-day from New York for all orders placed before 2 PM ET, Monday through Friday. We use insulated cold-shipping where indicated. International researchers should review our /shipping page for region-specific guidance.