The clear, honest reference for research peptides.
Profiles of the most discussed peptides — what they are, why they're researched, what the evidence actually says, and where to read the studies.
See every profile, filter by evidence level and regulatory status. BPC-157, Semaglutide, Tirzepatide, GHK-Cu, NAD+, and more.
All 25 profilesExplore peptides organized by common research interests — fat loss, recovery, sleep, mood, longevity. Research categories, not medical advice.
10 categoriesStart here
BPC-157
Animal / LabA 15-amino-acid fragment derived from a stomach-protecting protein, widely studied in rodents for gut, tendon, and ligament repair.
GHK-Cu
Limited Human EvidenceA naturally occurring copper-binding tripeptide widely used in cosmetics and studied for skin remodeling and wound healing.
Semaglutide
Strong Human EvidenceA GLP-1 receptor agonist FDA-approved for type 2 diabetes (Ozempic) and chronic weight management (Wegovy).
Tirzepatide
Strong Human EvidenceA dual GIP/GLP-1 receptor agonist FDA-approved for type 2 diabetes (Mounjaro) and chronic weight management (Zepbound).
PT-141 (Bremelanotide)
Strong Human EvidenceA melanocortin receptor agonist FDA-approved as Vyleesi for hypoactive sexual desire disorder in premenopausal women.
NAD+
Limited Human EvidenceA central coenzyme in energy metabolism that has been studied as a supplement and IV therapy for aging, fatigue, and metabolic health.
Every profile is written for the curious reader, not the biochemist. Studies are summarized in human terms.
Most popular peptides have little or no human trial data. We say that clearly, and grade what does exist conservatively.
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