Peptides

Every peptides claim we've checked against the studies, newest first.

Three photos of the same young man in a gray t-shirt against a gray wall: overweight; then thin with narrow shoulders after losing weight without lifting; then lean with muscular arms after losing weight while lifting weights and eating enough protein.

Sep 29, 2026 · Grade: Unproven

Peptides: the fat-loss ones are proven. The healing and anti-aging ones haven't been tested yet

GLP-1 peptides like semaglutide and tirzepatide cut body weight by 15% to 21% in large placebo-controlled trials, and retatrutide reached 28% in 2026. BPC-157 for healing and epitalon for aging have strong animal results, but only 31 people have been studied on BPC-157, all without a comparison group, and the first placebo-controlled trial is only now under way.