The science
BPC-157 vs TB-500 for dogs: what is the difference?
A side by side look at the two peptides most often sold for dogs, and what the evidence says about using them together.
By The Puptides Desk. Updated 2026-11-13.
Many brands sell BPC-157 and TB-500 as a "stack". Here is how they differ.
Side by side
- Origin. BPC-157 derives from a gastric protein. TB-500 relates to thymosin beta-4.
- Research focus. BPC-157: tendon, gut and skin models. Thymosin beta-4: wound, eye and heart models.
- Dog trials. None of note for either.
- UK status. Neither is an authorised veterinary medicine.
- Sport. Both are prohibited by the World Anti-Doping Agency.
Is the combination better?
Sellers say the two complement each other. We have not found controlled studies testing the combination in dogs. The claim is a marketing position, not a finding.
Which is easier to buy in the UK?
BPC-157. It is the one compound sold by the only UK-based brand in our rankings. Blends mostly come from US brands, several of which do not confirm UK shipping.
What should an owner do?
Start with your vet and the question of what is actually wrong. Then read BPC-157 for dogs and TB-500 for dogs.
Read next
- BPC-157 for dogs: the complete UK guide
- Dog peptides, explained without the hype
- BPC-157 for dogs: what does the research actually show?
- Are dog peptides legal in the UK?
- Dog peptide brands ranked for UK buyers
Puptides is published by the team behind Peps for Pups, one of the brands reviewed here. We score every brand, including our own, on the same four published checks and we link our sources so you can verify them.