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Plain-language answers to what each peptide is and does.
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Popular right now
The Ozempic and Wegovy drug: a weekly shot that turns up your 'I'm full' signal so you eat less.
Healing & recoveryA 15-amino-acid chain based on a stomach protein, used after injuries. Almost all the evidence is from animals.
Weight lossA weekly shot that copies three fullness and fat-burning signals, with some of the largest weight losses in trials.
Recovery & muscleThe short-acting version: a quick growth hormone pulse that clears fast. Usually paired with ipamorelin.
Recovery & muscleSignals your pituitary to release a pulse of your own growth hormone, with little effect on hunger or stress hormones.
Skin & repairA copper-binding peptide your body uses in tissue repair. On skin it signals collagen, hence its place in skincare.
Commonly confused peptides
Long-form breakdowns of the pairs people confuse most, traced to primary sources.
One head-to-head trial, three pivotal trials, and why their headline weight-loss figures are not directly comparable.
Read comparisonSkin and repairThe same sequence, with or without copper: topical trial evidence, formulation caveats and the research-vial market.
Read comparisonMetabolic and weight lossIn STEP 8, semaglutide produced more weight loss than liraglutide; liraglutide offers generic availability and daily dosing.
Read comparisonMuscleACE-031 built muscle but was stopped for vascular side effects. Follistatin protein has not been tested by injection in people.
Read comparisonMetabolic and weight lossOne receptor, then two, then three, and the numbers climb with them. Only two of the three steps have a head to head behind them.
Read comparisonGrowth hormoneDistributing HGH for anti-aging is a federal felony carrying five years. Sermorelin lost to it commercially in 2008 and can still be legally compounded.
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