Every compound, graded by the evidence. Sources on every page.
This is a research library — independent education.
Get to know us:
What this is.
A reference on peptides as they appear in the published literature. Each compound gets a page, an evidence grade, a count of human trials, and its sources. Compounds are covered whether or not anyone sells them.
How to use it.
Start with the Research Index for the compound you’re curious about. Read the grade key to understand what A through D mean. Check the date on every grade — the literature moves, and so do we.
Who writes it.
Two educators who also run a research-use-only vendor, and who think the industry’s problem is anonymous sellers making claims. Full disclosure on the About page.
Every claim on this site is backed by published research — see the full citation trail in our Research Index.
Explore by Goal:
- Building Muscle — What the research says about BPC-157, growth hormone secretagogues, and tissue repair.
- Longevity — What the research says about NAD+, Epithalon, and cellular aging.
- Brain Function — What the research says about Semax, Selank, and synaptic plasticity.
- Immunity — What the research says about Thymosin Alpha-1 and immune signaling.
- Cosmetics — What the research says about GHK-Cu and collagen synthesis.
- Sexual Health — What the research says about Kisspeptin and the reproductive hormone axis.
Peptide Ledger 