Ranked by human evidence · every claim sourced · updated September 2026
What will actually help
Lose about a fifth of your body weightPeople in its big trial lost 20.9 percent of their weight on average. One shot a week, prescribed by a doctor, and the constant pull toward food goes quiet. This is the strongest card on the page.
Real results
The proven original14.9 percent mean loss in its landmark trial, and the longest track record of the two. This is the molecule behind Ozempic and Wegovy, and a pill form exists for people who will never do needles. A physician decides which version fits you.
Real results
The strongest one is not for sale24.2 percent mean loss in its phase 2 trial, and you still cannot legally buy it anywhere. Anyone offering it is selling an unregulated vial with nobody checking what is inside. Wait for the approval or pick one of the two above.
Not yet
GH peptides are not a weight toolCJC-1295 and ipamorelin work with your natural deep-sleep hormone pulse and at best nudge body composition over months. Clinics that promise Ozempic results from them are overselling. Different tool, different job.
May help
AOD-9604 failed its own trialsIt was tested for obesity in people and did not work. It keeps being sold for weight loss anyway. Keep the money.
Skip itWithout enough protein and some strength training, a GLP-1 takes muscle along with the fat. That conversation is part of the doctor path before the first shot, and it is the difference between losing weight and losing the right weight.
What it costs
Semaglutide, $139 to $325 a monthEleven programs tracked, every mandatory fee counted
Tirzepatide, $149 to $434 a monthNine programs tracked, the dose ladder lifts the bill
See every advertised price
Questions people ask
Do peptides really work for weight loss?
The GLP-1 ones do, and large randomized trials settled it. Peptides outside that family have little or no human weight loss evidence, whatever the clinic brochure says.
Are peptides the same as Ozempic?
Ozempic is a peptide, semaglutide. When a med spa advertises weight loss peptides, ask which molecule they mean. If the answer is not a GLP-1, expect a much smaller result.
What peptide gets rid of belly fat?
Only tesamorelin targets belly fat directly, and it is approved for visceral fat in HIV-associated lipodystrophy, where it cut that fat by roughly 15 percent. For ordinary belly fat, a GLP-1 plus a calorie deficit is the route with evidence behind it.
What is the downside of taking peptides?
With a GLP-1: nausea, stomach trouble, muscle loss without resistance training, and weight coming back after stopping. With a gray-market vial: unknown dose, unknown purity, no doctor watching.
How much do weight loss peptides cost?
Compounded semaglutide runs $139 to $325 a month once mandatory fees are counted, tirzepatide $149 to $434. If you have insurance or qualify for a manufacturer savings program, a brand product can beat every one of those numbers.
Sources: PubMed — semaglutide STEP 1 · PubMed — tirzepatide SURMOUNT-1 · FDA on compounded GLP-1s
