Thymic peptide · FDA approved (ex-US).
Thymosin α-1 is a 28-residue acetylated peptide originally isolated from thymic fraction 5 in the 1970s by Goldstein's group. It is one of the most clinically developed thymic peptides, approved (as Zadaxin) in multiple countries for immune modulation. Supplied as research-grade material with 3rd-party HPLC verification and full Certificate of Analysis per lot.
Thymosin α-1 is a 28-residue acetylated peptide originally isolated from thymic fraction 5 in the 1970s by Goldstein's group. It is one of the most clinically developed thymic peptides, approved (as Zadaxin) in multiple countries for immune modulation.
Published literature describes Thymosin α-1 as a TLR9 (Toll-like receptor 9) ligand on dendritic cells, driving Th1-polarized immune responses. Reported effects include enhancement of T-cell differentiation, maintenance of peripheral T-cell repertoire diversity, and modulation of cytokine production profiles.
Approved as Zadaxin (SciClone Pharmaceuticals) in over 30 countries for chronic hepatitis B, immune reconstitution in cancer, and as a vaccine adjuvant. Not FDA-approved in the United States.
The above summarizes published research literature. This is not medical advice, a protocol, or a recommendation for use. This compound is supplied for laboratory research only.
Thymosin α-1 is a 28-residue peptide with molecular formula C129H215N33O55 and molecular weight of approximately 3,108.3 Da.
The full structural data and release specifications are in the Compound Profile section above. Every lot ships with an independently verified Certificate of Analysis.
Each lot is independently verified by a 3rd-party analytical laboratory (STERIS Labs, Alcami Analytical, or equivalent) before release. Release specification is HPLC purity ≥ 99.5% (typical > 99.8%), mass spectrometry identity match within ±0.5 Da, water content < 5.0% Karl Fischer, and endotoxin < 0.25 EU/mL by LAL (USP <85>).
Look up the full COA for your lot at coa-lookup.html.
All compounds ship at ambient temperature in discreet, tamper-evident packaging. Lyophilized peptide powder is stable at room temperature for typical transit windows, which is why research-grade vendors ship this way. Tracked; signature not required.
Store unopened lyophilized product at 2–8°C protected from light. Once reconstituted, most peptides are stable at 2–8°C for approximately 28 days (compound-dependent).
Approved as Zadaxin (SciClone Pharmaceuticals) in over 30 countries for chronic hepatitis B, immune reconstitution in cancer, and as a vaccine adjuvant. Not FDA-approved in the United States.
All PeptideBros compounds are sold strictly as chemical reference materials for in-vitro laboratory research. They are not for human consumption.
HPLC-verified. Mass-spec confirmed. Ambient-stable transit. The paperwork other vendors hope you never ask for.