Why this exists.

Most peptide content online is one of two things — a hype-y supplier blog trying to sell you something, or forum anecdote dressed up as research. Neither tells you what the actual studies show, including the parts where the evidence is thin or doesn't exist yet.

PeptideFacts is the reference I wanted while running these compounds myself. Every dosing range cites a clinical trial, manufacturer protocol, or published guideline. Every mechanism description points back to primary literature. When the answer is "we don't really know," it says that.

How it's funded.

The library, calculators, glossary, and safety pages are free and always will be. The AI Q&A — which is trained on a curated corpus and costs real money per query — has a 3-question free trial, then $9/mo. No affiliate links. No supplier deals. No newsletter sponsorships. If we ever change that, it'll be on this page first.

What this site is not.

• Medical advice. Talk to a licensed physician.
• A sourcing guide. We don't link suppliers.
• A community. No forum, no comments — too much liability and noise.
• A complete list. We add peptides as we get the research right.

Corrections.

Found a citation that's wrong, a dosing range that's outdated, or a side effect we missed? Open an issue on GitHub. The corpus is versioned — you can see exactly what changed and when.

— Matt