Browse by goal
What are peptides good for?
Start with what you are trying to do. Each page lists every peptide people use for that goal, ordered by how strong the human evidence actually is — so the first thing you see is what holds up, not what is marketed hardest.
Weight loss & fat reduction
The most-searched use in the category, and the one where the gap between what works and what is sold is widest. Every peptide below is used for weight or fat loss; the grade tells you which ones have actually shown it in people.
Healing, injury & gut recovery
Tendon, ligament, joint, wound and gut healing — the use case that built the peptide community's reputation. It is also the one where the animal-to-human gap is largest, so read the grades closely.
Muscle, body composition & performance
The growth-hormone peptides — the ones marketed for lean mass, strength and recovery. Nearly all of them reliably raise growth hormone. Whether that translates into the body-composition change people buy them for is the question the grades answer.
Sexual health & libido
The melanocortin peptides, including one that made it all the way through FDA approval. This is a use case where a peptide genuinely cleared the bar — and where the gray-market version of that same peptide did not.
Skin, hair & tanning
The cosmetic end of the category — and, unusually, one where topical formulations have real controlled human data behind them.
Sleep
Deep sleep, REM and circadian rhythm are among the most common reasons people try peptides. The strongest evidence on this page is not from a peptide marketed for sleep at all.
Cognition, focus & anxiety
The nootropic peptides — mostly developed and studied in Russia, which is the central fact about this category. The research is real; it is also small, often unreplicated, and rarely published to Western trial standards.
Longevity & healthy aging
The anti-aging end of the category, where the marketing is boldest and the human evidence is thinnest. Several of these have genuinely interesting mechanisms; none has shown a lifespan effect in people.
Blood sugar & metabolic health
Type 2 diabetes, insulin sensitivity and cardiovascular risk. This is the best-evidenced use case in the entire catalog, because it is where the pharmaceutical industry ran the large trials.
Prefer to look up a specific compound? Browse all peptide briefs or compare two head to head.