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Retatrutide, tirzepatide, BPC-157, GHK-Cu and more: the real results from the real studies, explained in plain English. Whether you're new, in the gym, or chasing longevity, start here.
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Real results
The biggest numbers from the actual trials, front and center.
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Every goal covered
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Sourced, so you can trust it
Every claim links to the study or FDA label behind it.
The hottest peptides right now
Compare all 13 →Weight & metabolismSemaglutideFDA-approvedThe GLP-1 that started it all. Big weight loss, heart protection too.Weight & metabolismTirzepatideFDA-approvedTwo receptors, one weekly shot. Beat semaglutide head-to-head.Weight & metabolismRetatrutideResearch purposes only (investigational)Three receptors. Up to −25% average weight in Phase 3.Weight & metabolismOrforglipron (Foundayo)FDA-approvedThe new daily weight-loss pill. No needles, no food timing.Healing & recoveryBPC-157Research purposes onlyThe recovery peptide the gym world can't stop talking about.Healing & recoveryTB-500 (thymosin beta-4)Research purposes onlyBuilt on thymosin beta-4, the body's own repair protein.SkinGHK-Cu (copper peptide)Research purposes only (injectable)The copper peptide in your favorite serums. Collagen support.SkinCollagen peptidesDietary supplementReal trial results for skin. Just a scoop a day.Growth hormoneTesamorelin (Egrifta)FDA-approved (HIV lipodystrophy only)FDA-approved GHRH that targets deep belly fat.Growth hormoneCJC-1295 & ipamorelinResearch purposes onlyThe famous GH stack. CJC-1295 raised GH up to 10× in studies.LongevityMOTS-cResearch purposes onlyMitochondrial peptide nicknamed "exercise in a vial."Brain & focusSemaxResearch purposes onlyNasal-spray peptide studied for brain recovery and BDNF.Sexual healthPT-141 (bremelanotide, Vyleesi)FDA-approved (as Vyleesi)FDA-approved, as-needed. Works on desire in the brain.
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Newsletter archive
#1BPC-157's thin human evidence, tirzepatide vs. semaglutide, and moreOctober 16, 2026 · 5 studies
Not medical advice. Education only. We don't sell anything or tell you what to take. Label doses are there so you can follow along with your prescriber. Talk to a licensed clinician about your health.