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Updated 6 Nov 2026

Peptides and competition rules by discipline

Which rulebook applies to your horse, how testing works, and the injuries each sport is known for. No competition horse should get any peptide.

  1. Racehorses and peptides: HISA rules, testing and injuriesHISA bans thymosin and unapproved substances at all times, with testing out of competition too. What the rules say, common racehorse injuries, and vet care.
  2. Eventing, dressage and jumping: FEI peptide rules and injuriesTB-500 is Banned on the 2026 FEI list and other peptides fall under its catch-all clause. How FEI testing works, common sport horse injuries, and vet care.