About Peptifact

Peptifact exists because the research-peptide market runs on claims nobody checks. Vendors publish purity numbers with nothing behind them; buyers gamble on checkout pages.

The checking is the protocol: anonymous test orders, certificates cross-checked against third-party laboratory analysis, shipping and support measured — the same 14 points for every vendor, documented so the work can be audited. Vendor reviews publish once the first cohort finishes testing.

Rankings on this site follow our published testing criteria. They are never sold, and no vendor can pay to change a score.

Peptifact is operated by Sherdas LLC. Contact: contact page.

Who works on Peptifact

• Caroline S

  Editor

  Caroline S edits Peptifact. She decides what the site covers, holds every page to the standard published on the methodology page before it runs, and is the person to write to about a correction.

• Robert F

  Writer

  Robert F writes Peptifact's vendor and product documentation. His pages are built from what a seller publishes and what regulators publish about them: certificates of analysis, warning letters, label copy, shipping and price pages — each read on a stated date and linked, so a reader can go and check the same document.

• Sharon Johnsson

  Testing lead

  Sharon Johnsson runs Peptifact's testing programme. She specifies which products go to the laboratory, how a sample is handled from doorstep to dispatch, and what a result has to show before it appears on the site — identity, purity, and the net peptide actually in the vial, which is the figure that makes a price per verified milligram possible at all.