Peptides, explained without the hype.
What they are, what the research actually supports, and what's still unknown. No selling — just the groundwork to read the rest of the site.
What is a peptide?
A peptide is a short chain of amino acids — the same building blocks that make up proteins, just fewer of them. Your body already makes thousands of them to signal cells, repair tissue, and regulate metabolism. The research compounds catalogued here are synthetic versions studied for specific effects. Most are not approved for human use and are sold for research only.
102 peptides indexed so far — each with mechanism, dose range, and the research behind it.
Find the research by what you're after.
Six broad areas these compounds get studied for. Pick one to jump into the directory.
Healing & recovery
Studied for tendon, ligament, and gut-tissue repair.
BrowseMetabolic & weight
GLP-1 class and related metabolic compounds.
BrowseGrowth hormone
Secretagogues that prompt the body's own GH release.
BrowseCognitive & mood
Studied for focus, memory, and stress.
BrowseLongevity & cellular
Compounds studied for aging and cellular repair.
BrowseSkin, hair & cosmetic
Topical and cosmetic-focused peptides.
BrowseNot all evidence is equal.
Every claim on the site is tagged by where it comes from. From strongest signal to softest:
- 1
Human trials
Tested in people. The strongest signal, and the rarest for these compounds.
- 2
Animal studies
Most peptide research lives here. Promising, but doesn't always translate to humans.
- 3
Lab / mechanistic
Shows how something works in a dish, not whether it works in a body.
- 4
Clinical pearls
What clinicians and experienced users report. Useful context, not proof.
Why we obsess over COAs.
A Certificate of Analysis is an independent lab's measurement of what's actually in a vial — purity, identity, and sometimes contaminants. In a grey market with no FDA oversight, the COA is the closest thing to ground truth. We catalog them so you can check the evidence yourself instead of trusting a label.
Every COA on file links back to the lab that ran it and the vendor whose product it tested — so you can trace the number, not just take it.
Vendor verification, step by step.
How to check if a vendor is legitimate, what COAs contain, how to read them, and how to spot a fake.
Vendor verification
How to check if a peptide vendor is legitimate
Six things to verify before buying — COAs, labs, lot matching, and regulatory status.
Read guideCOA basics
What is a peptide COA test?
What a certificate of analysis contains, what it proves, and what it doesn't.
Read guideCOA reading
How to read a peptide COA
Field-by-field walkthrough — compound name, lot number, purity, test method, and test date.
Read guideAnti-fraud
How to verify a peptide COA is real
Red flags, Janoshik portal verification, and signs of a fabricated document.
Read guideIndependent labs
Best labs for peptide testing
Janoshik, Benchmark Analytical, RRC — the independent labs behind most peptide COAs.
Read guideScoring methodology
Peptide vendor trust scores explained
How the Merit Score (0–100) is calculated and what it does and doesn't measure.
Read guideTesting coverage
Which peptide vendors do third-party testing?
Every vendor with independent COAs on file, sorted by evidence depth — from a single test to hundreds.
Read guideCOA corpus
Peptide COA registry data
Corpus statistics, methodology, and provenance for Merit's index of independent peptide test results.
Read guideBefore you go further.
Most compounds on this site are sold for research use only and are not approved for human use. Nothing here is medical advice. Talk to a clinician who knows your full health picture before making any decision. We catalog evidence; we don't tell you what to put in your body.
Research use only — not for human consumption and not approved by the FDA. Nothing here is medical advice.