Is TB-500 safe?
Limited EvidenceSide effects, risks, and safety considerations based on available research.
Research status
TB-500 has very limited human safety data. Most information comes from animal studies, in vitro research, or anecdotal reports. This means the true risk profile in humans is largely unknown.
Known concerns & side effects
- ⚠not FDA approved
- ⚠banned by WADA — positive drug test risk for competitive athletes
- ⚠unregulated sourcing and purity concerns
- ⚠unknown long-term safety profile in humans
Use caution with
Frequently asked questions
Is TB-500 banned in sports?
Yes. TB-500 (Thymosin Beta-4) is on the World Anti-Doping Agency (WADA) prohibited list. Competitive athletes who test positive face sanctions. It is not appropriate for anyone subject to drug testing.
What is the difference between TB-500 and Thymosin Beta-4?
TB-500 is a synthetic fragment of the naturally occurring protein Thymosin Beta-4. They share the same active region but are not identical. Most products sold as TB-500 contain the synthetic peptide fragment.
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Last updated: 2025-03-01
Medical Disclaimer
The information on this site is for educational and informational purposes only. It is not intended as medical advice and should not be used to diagnose, treat, or prevent any condition. Always consult with a qualified healthcare professional before starting any new supplement, peptide, or treatment protocol.