Verified ComparisonLast updated: 26 April 2026
Best Peptides for Fat-Loss Research
Fat-loss peptides are studied extensively in metabolic research. We rank the most-discussed candidates by effect size, evidence quality, and regulatory status.
Retatrutide
Metabolic
4.8/ 5
A+
Semaglutide
Metabolic
4.3/ 5
A−
Editor's note
Retatrutide shows highest reported weight loss; semaglutide leads on clinical evidence and approval.
| Criterion | Retatrutide | Semaglutide |
|---|---|---|
| Highest weight loss reported | Retatrutide (triple agonist) | Semaglutide (GLP-1) |
| Clinical evidence depth | Growing (Phase II/III) | Extensive (multi-year approval) |
| Approved in Australia | No | Yes |
| Additional metabolic targets | GIP + glucagon | GLP-1 only |
Frequently asked questions
We rank by effect size, safety clarity, and evidence quality — not by recommendation for use.
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