Peptide questions, answered from the files

Is BPC-157 proven to heal injuries in humans?

No. BPC-157 has hundreds of rodent studies and almost no controlled human trials, so its healing claim is stamped Unproven. See BPC-157 for healing and the BPC-157 and TB-500 blend file.

Do collagen drinks reduce wrinkles?

Partly. Several small trials report modest gains in skin hydration and elasticity, but the effects are small and many studies are funded by the makers, so the claim is rated Mixed. See do collagen peptides really smooth skin.

Is Ozempic a peptide?

Yes. Semaglutide, the drug in Ozempic, is a modified GLP-1 peptide with a fatty acid chain. Unlike most weight loss peptides sold online, it has large trials and an approved label. See is Ozempic a peptide.

What does "research use only" mean on a peptide?

It is a legal phrase, not a quality mark: the seller states the product is not for human use and so steps outside the rules that protect patients. See what research use only actually means.

How long does retatrutide take to work?

Trials report weight change at 24, 48 and 80 weeks, and no published first month curve exists, so a claim about the first weeks is Unproven. See how long retatrutide takes to work.

Is there a tested GHK-Cu injection dose?

No. GHK-Cu has cosmetic cream data and cell and animal work, but no human study sets an injection dose. See GHK-Cu dosage claims.

Does KPV fight cancer?

The cancer work on KPV is limited to mouse models of colitis associated tumours, with no human trials, so the claim is Unproven. See KPV peptide cancer research.

What do Solid, Mixed, Weak and Unproven mean?

They are the four verdicts on a claim as worded: Solid means strong, repeated human trials; Mixed means real but limited evidence; Weak means thin, indirect or contradicted evidence; Unproven means no meaningful human data. The five-step meter scores the evidence itself. See how we grade.

Last updated 28 Oct 2026. See also the editorial policy, privacy policy and how we grade.