We built the reference we couldn't find.
Grey Peptides is an independent peptide knowledge base. No products for sale. No vendor commissions. No sponsored reviews. Just peer-reviewed science, organized clearly and reported honestly.
The information existed — scattered across FDA prescribing documents, PubMed abstracts, EMA filings, clinical trial registries, and community forums. But no single source stitched it together without an agenda. Every site selling peptides had a reason to bend the truth. Every forum thread mixed solid pharmacology with guesswork. We spent months cross-referencing sources before deciding: if the honest reference doesn't exist, build it.
Grey Peptides launched with one principle: the evidence speaks for itself. We don't inflate it. We don't soften it for a revenue share. We don't pretend a rodent study is a clinical trial. What we do is gather every verifiable source we can find, grade the evidence honestly, and present it in a format that respects your intelligence.
The result is an encyclopedia of 296+ peptide compounds, a growing library of in-depth articles, and a suite of interactive tools — all free, all independent, and all built on named, verifiable sources.
Make peptide science accessible, accurate, and free from commercial bias.
Peptides are one of the fastest-growing areas in biomedical research. The public deserves a resource that keeps pace with the science — one that distinguishes FDA-approved therapeutics from research compounds, community protocols from clinical dosing, and established evidence from preliminary findings. That's what we're building.
What we stand on
Independence
We don't sell peptides, accept vendor payments, or publish compensated reviews. Our only incentive is accuracy.
Honest evidence
Every compound is graded high, medium, or low — and we mean it. A rodent study is not a clinical trial. The label on the bottle doesn't inflate the evidence.
Named sources
Every entry cites at least one verifiable source — FDA documents, PubMed articles, EMA filings, or clinical trial registries. No anonymous claims.
Respect for the reader
We don't dumb things down or hide behind jargon. We give you the real information and trust you to use it wisely with your healthcare provider.
Clarity over hype
Community dosing is labeled community dosing. Preliminary data is labeled preliminary. We never present speculation as established science.
Free access
Every tool, article, and encyclopedia entry on Grey Peptides is free to use. Quality information about your health shouldn't sit behind a paywall.
What you won't find anywhere else
Zero commercial ties
Most peptide sites exist to sell you something. We exist to tell you what the science actually says. There's no cart, no affiliate code, and no vendor deal influencing what we publish.
Interactive tools built for real decisions
Our reconstitution calculator, protocol builder, interaction checker, and half-life visualizer aren't gimmicks. They're the tools we wished existed when we were doing the research ourselves — and several are the first of their kind online.
Evidence grading that means something
When we say "low evidence," we mean it. In-vitro data doesn't get dressed up as proof. Cosmetic peptides with only manufacturer-funded studies don't receive the same grade as FDA-approved compounds with decades of post-marketing data.
Community dosing, clearly labeled
Many peptides are discussed in biohacker and research communities without approved clinical dosing. Where community protocols exist, we report them — and clearly separate them from regulator-endorsed or trial-documented dosing.
What this site is not
Grey Peptides is not a store, a pharmacy, or a prescribing service. We do not sell peptides, supplements, or any other product. We are not affiliated with any peptide manufacturer, compounding pharmacy, or vendor — and we never will be.
We are also not a substitute for medical advice. The information here is educational. It is drawn from published research, regulatory filings, and clinical data — but reading about a compound is not the same as discussing your health with a licensed professional who knows your history.
Contact
For corrections, editorial inquiries, or partnership proposals, contact the editorial team at editors@greypeptides.com.
Medical disclaimer
Grey Peptides is not medical advice. Many compounds described here are not approved for human use in the United States or elsewhere. Regulatory status varies by country. Evidence ranges from extensive post-marketing data spanning decades to minimal preclinical studies. Nothing on this site substitutes for a conversation with a licensed medical professional about your specific situation.
We provide the information. Your doctor provides the guidance.
Start exploring
Dive into the encyclopedia, run the tools, or read the guides. Everything is free.