Verified Peptide ReviewLast reviewed: 22 March 2026
Compound Profile · Immune
Thymosin Alpha-1
Thymosin alpha-1 is a 28-amino-acid peptide that has been studied and approved in some jurisdictions for hepatitis B and as an adjunct in certain immune contexts.
LegalPrescriptionEvidenceModerateHuman useApproved
8.0/ 10
Peptide Score
Evidence
Safety
Regulatory
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Quick verdict
Better characterised than most immune-modulating peptides discussed online, with an approved indication in some jurisdictions.
Reality check
What this isn't
- Moderate evidence — replication still building
- Side-effect profile not fully characterised
- Educational only — not medical advice
Full Thymosin Alpha-1 review
An immune-modulating peptide derived from thymosin fraction 5.
Looking at alternatives?
Compounds with comparable research interest but different evidence, regulatory status, or risk profile.