Reviewed by the Peptica editorial team
Published 5 June 2026
Source-based, neutral information — no medical advice, no sales. Editorial standards
TB-500 is often mentioned alongside BPC-157 in the recovery scene. It relates to thymosin beta-4, a naturally occurring protein involved in cell movement and tissue regeneration. Important up front: TB-500 is not an approved medicine and is explicitly banned in sport. This article explains neutrally what is known.
What is TB-500?
TB-500 is a synthetic peptide modeled on an active section of thymosin beta-4. Thymosin beta-4 occurs naturally in the body and plays a role in cell migration and repair processes.
Research context
TB-500 has been studied mainly in relation to tissue regeneration and flexibility. As with BPC-157, most findings come from animal and lab studies; robust human data is limited.
TB-500 vs. BPC-157
Both are discussed in the community in a recovery context, but they are different molecules with different origins: BPC-157 derives from a gastric-juice protein, TB-500 from thymosin beta-4. Neither is approved.
Legal status & anti-doping
TB-500 is not approved as a medicine. In sport, thymosin beta-4 / TB-500 is on the World Anti-Doping Agency (WADA) prohibited list, so it is clearly not permitted for competitive athletes.
Frequently asked questions
Is TB-500 approved?+
No. TB-500 is not an approved medicine and is considered an experimental research compound.
Is TB-500 banned in sport?+
Yes. Thymosin beta-4 / TB-500 is on the WADA prohibited list.
How does it differ from BPC-157?+
They are different molecules with different origins. Both are researched in a recovery context; neither is approved.
Related peptides
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