Is TB-500 legal?
TB-500 is not FDA approved as a finished drug. For drug-tested athletes it is WADA banned (S2). Not prescribed in conventional medicine.. Legal status depends on your country and changes over time. This reflects US status at the time of writing and is not legal or medical advice.
Regulatory status
- FDA: Not FDA approved for any indication.
- WADA: Banned (S2)
- Prescription: Not prescribed in conventional medicine.
References
- Thymosin β4: a novel regenerative pharmacological agent — Goldstein AL & Kleinman HK, Ann NY Acad Sci, 2012
- Thymosin beta4 activates integrin-linked kinase and promotes cardiac cell migration, survival and cardiac repair — Bock-Marquette I, Saxena A, White MD, Dimaio JM, Srivastava D — Nature, 2004
Pepdex is an editorial reference, not medical advice. Peptides vary in legal and approval status by country, many are research compounds without full human safety data. Talk to a qualified clinician before starting anything.
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Last updated 2026-06-06.