Health Canada
Is TB-500 (thymosin beta-4 fragment) legal in Canada?
ProhibitedNot authorised; named in Health Canada's 2026 seizure advisory and banned in sport
Supply is banned or actively enforced against.
No TB-500 or thymosin beta-4 product is authorised in Canada. Health Canada lists TB-500 among unauthorised injectable peptides it has seized (advisory of 2026-04-09), and the Optimum Wellness Centre (2025-04-02), Canada Peptide (2025-08-01) and Rize Fitness (2025-12-24) notices also name thymosin beta-4 (TB-500). Selling unauthorised injectables is illegal. The WADA Prohibited List 2026 bans thymosin-beta-4 and its derivatives, such as TB-500, in S2.3.
Last verified 2026-09-29 · how we verify
TB-500 (thymosin beta-4 fragment) elsewhere
Sources (6)
- 01Think twice before injecting peptides bought online: unauthorized products can seriously harm you (RA-81874)Health Canada · 2026-04-09 · accessed 2026-09-29
- 02Unauthorized injectable peptide drugs seized from Optimum Wellness Centre in Calgary, Alberta may pose serious health risksHealth Canada · 2025-04-02 · accessed 2026-09-29
- 03World Anti-Doping Code International Standard: Prohibited List 2026World Anti-Doping Agency · 2025-09 · accessed 2026-09-29
- 04Drug Product Database API: active-ingredient search for thymosinHealth Canada (Drug Product Database) · 2026-09-29 · accessed 2026-09-29
- 05Unauthorized injectable peptide drugs seized and sold by Canada Peptide may pose serious health risks (RA-77807)Health Canada · 2025-08-01 · accessed 2026-09-29
- 06Unauthorized health products sold online and seized at Rize Fitness may pose serious health risksHealth Canada · 2025-12-24 · accessed 2026-09-29