Thymosin Alpha-1Cellular PeptideSafety Rating 8/10
Research-literature reference data, NOT patient instructions. Not for human use. Consult a licensed clinician for any human application.
Price Comparison
Compare vendors · per 5mg
| Vendor | Price | $ / mg | Updated | |
|---|---|---|---|---|
| Ascension PeptidesBest $/mgCOA ✓ · 3P | $37.50 | $3.75 | Apr 16, 2026 | Buy → |
| Optimum FormulaCOA ✓ · 3P | $40.49 | $4.05 | May 14, 2026 | Buy → |
| Amino ClubCOA ✓ · 3P | $31.99 | $6.40 | May 14, 2026 | Buy → |
| Polar PeptidesCOA on request | $64.79 | $6.48 | Apr 17, 2026 | Buy → |
| PureRawzCOA ✓ · 3P | $79.45 | $7.95 | May 14, 2026 | Buy → |
Overview
About Thymosin Alpha-1
Mechanism of action
Endogenous peptide derived from thymosin fraction 5; modulates T-cell differentiation and maturation; upregulates MHC class I expression; stimulates dendritic cells; potentiates NK cell activity.
Safety profile
Very well-tolerated. Injection site reactions; rare flu-like symptoms. Decades of safety data. · 11,000+ patients in 30+ trials; well-tolerated; approved as Zadaxin globally; excellent safety record
Storage
Stability & handling
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Research
Studies & key findings
- Endogenous 28-amino-acid peptide derived from prothymosin α; approved (Zadaxin) in 35+ countries for chronic hepatitis B, hepatitis C, and as an adjuvant in cancer immunotherapy.
- Phase 3 RCT in chronic HBV (1998) showed thymosin α1 plus interferon-α produced significantly higher seroconversion rates than interferon alone.