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 Area:

• Growth-Hormone Axis — BPC-157, secretagogues, and tissue-repair compounds.
• Longevity and Mitochondrial — NAD+, epithalon, and cellular-aging compounds.
• Neuro and Cognition — Semax, Selank, and synaptic-plasticity compounds. Immune-Modulating — thymosin alpha-1 and immune-signaling compounds.
• Skin and Topical — GHK-Cu and collagen-related compounds. Reproductive and
• Reproductive & Sexual Function — kisspeptin and the reproductive hormone axis.