Sport rules apply away from competition too.

The ban is not limited to an event

For the list in force during 2026, the World Anti-Doping Agency names TB-500 among substances prohibited both during and outside competition.

January 1, 2027 is the effective date for the replacement list, which retains the TB-500 entry. The checks of both sports lists are dated September 30, 2026.

College sport has its own list

The US college sports body, the NCAA, names TB-500 on its 2026–27 banned-substance list. That is a separate record from the world anti-doping list.

Ask the sports organisation that governs you which rules apply. Keep its written reply with your care questions. A general answer about workplace testing does not answer a question about your sport.

Do not turn a laboratory method into a timetable

Published lab work describes ways to find TB-500 and the smaller parts left when it breaks apart. Some methods were checked using horse samples. Those tests cannot tell how long TB-500 could be found in a person.

Take a question about the applicable rules to your sports body before relying on an offer’s assurance.

If an offer says a substance is permitted, ask which rule and date support that statement. Ask the relevant sports body to address that exact claim rather than relying on a broad assurance about peptides.