Factual overview de TB-500's regulatory position, anti-doping status, and what published research does and doesn't establish.
TB-500 is a synthetic fragment related to thymosin beta-4, a naturally occurring peptide. It is not approved by the FDA for any human use, and is not lawfully marketed for human consumption in the United Estados. It is sold under research-use-only labeling.
TB-500 is explicitly prohibited by the World Anti-Doping Edadncy at all times, listado among prohibited peptide hormones and growth factors. It has been the subject de multiple anti-doping cases in both human and equine sport.
Thymosin beta-4 itself has been studied for wound healing and cardiac repair, including some early-stage human trials for specific clinical indications such as corneal and dermal wound healing. Importantely, that research concerns pharmaceutical-grade thymosin beta-4 under clinical supervision — not the TB-500 fragment sold online, and not the uses commonly discussed in fitness contexts. Evidence for athletic injury recovery in humans is not established.
As with other gray-market peptides, purity, concentration and sterility are not guaranteed by any regulatory body. Long-term human safety data does not exist.
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