The peptide evidence authority

We publish our evidence — graded, scoped, and signed.

Fair Witness grades every peptide claim by research strength and adds what a four-decade clinician has observed in practice — in a voice built to help you decide, including not to.

How we grade every claim

We don’t ask you to trust a polished surface. We show the grade as the surface — the strength of the evidence, the human-vs-animal split, and the regulatory status, on every peptide:

Illustrative grade. Every published peptide carries its own evidence apparatus, cited to the underlying studies and cleared by our Medical Director.

The launch library

We go narrow and deep first — a focused set of compounds, each a graded, cited, clinician-reviewed explainer:

• GHK-Cu
• BPC-157
• Ipamorelin
• CJC-1295

Browse the Peptide Library →

Latest

• Tesamorelin — Tesamorelin is FDA-approved — but only for HIV-associated lipodystrophy, where it genuinely reduces visceral fat in replicated Phase-3 trials. We separate that approved, evidenced core from the off-label anti-aging and fat-loss use that rides on it, and surface the durability catch (the fat returns when you stop), the IGF-1, glucose, and neoplasm warnings, and the WADA ban that applies even to an approved drug.
• TB-500 — TB-500's recovery use rests on animal data and a single rat ligament study; the human trials studied a different molecule for other conditions, and the well-powered ones failed. We grade each claim by tier and surface the FDA listing and the WADA ban.
• BPC-157 — BPC-157's healing evidence is almost entirely from animal studies; the only human data is one small uncontrolled case series. We grade each claim by tier, separate animal from human, and surface the FDA Category-2 listing and the WADA ban.
• CJC-1295 — In healthy adults, the with-DAC form of CJC-1295 raises growth hormone and IGF-1 for days, a biomarker, not a proven benefit. We grade each claim by tier, separate the with-DAC research form from the no-DAC form usually sold, report what clinics and communities actually do with it, and surface the halted 2006 trial, the death, the FDA non-approval, and the WADA ban.
• GHK-Cu — GHK-Cu has real human evidence applied to the skin and none injected. We lead with the actual trial numbers, grade each claim by tier, separate the topical lane from the injected lane, and surface the copper-safety and regulatory status.
• Ipamorelin — Ipamorelin transiently raises growth hormone in healthy men, a real biomarker effect, but no human study shows that produces fat loss, muscle, anti-aging, or any benefit. We grade each claim by tier, separate human from animal evidence, and surface the failed trial, the FDA non-approval, and the WADA ban.

We sell nothing. We run no storefront. We carry no affiliate links. The most resonant promise we make is the one most publishers won’t: when the honest read of the evidence is “not yet” — we’ll tell you that too.