What the research actually says about peptides.
The Peptide Informative is a plain-language reference to published peptide research. Every claim is graded by the kind of evidence behind it and linked to its source. Our community runs on one rule: cite it or label it as anecdote.
Evidence first
We cite primary sources: PubMed, ClinicalTrials.gov, FDA and WADA. We never cite sellers or forums as evidence, and animal results are never presented as human benefits.
Informational only
We report what studies did and found. Doses appear only as citations of published studies, with the population, route and duration. We never give personal dosing advice or use instructions.
Truly independent
The evidence library (profiles, blog and community) has no vendor links, coupon codes or paid placement. Vendors appear only in our separately labeled Vendors directory. Ownership is disclosed on our About page.
Featured peptide profiles
Each profile follows the same 10-part template, with a dated regulatory status.
Semaglutide
Once-weekly GLP-1 receptor agonist studied in large randomized trials for weight and cardiovascular outcomes.
BPC-157
Synthetic 15-amino-acid peptide. Most results come from animal studies; human data are three small, uncontrolled studies.
GHK-Cu
Copper-binding tripeptide used in skin-care products. Lab and animal work dominates; controlled human data are sparse.
Tirzepatide
The most-searched peptide in the US. An FDA-approved prescription drug, marketed as Mounjaro and Zepbound.
Retatrutide
The most-searched research peptide on Bing. Investigational only, in late-stage trials, and not approved anywhere in the world (ArentFox Schiff).
PT-141 (Bremelanotide)
An FDA-approved drug for one specific indication in premenopausal women, and also widely sold outside that approval.
Latest from the blog
Explainers on evidence and regulation, written for non-specialists.
How to read peptide research: evidence grades, explained
Why a rat study is not a human result, what “very low certainty” means, and how we grade every peptide in the library.
The October 2026 HHS compounding change: what it means and what it doesn't
Six peptides can now be compounded by licensed pharmacies under strict conditions. That is not FDA approval, and it does not cover research-use-only sellers.
Ask questions. Share sources. Help the library grow.
- Discussion threads for every peptide profile
- Citation-first posting: claims link to studies
- No sourcing, no selling, no personal dosing advice
Read the community guidelines first.