This is a map of what people talk about — it is not medical advice, not a recommendation, and not a “take this for that” list. Most compounds below are investigational and unapproved, with evidence ranging from “huge human trials” to “one excited guy on a forum.” The Peptide University doesn't sell peptides or supplies. Read the linked profiles, then talk to a qualified clinician before doing anything.
The one rule
- “There's a peptide for that” is a vibe, not a fact. Popularity is not proof.
- A handful are genuinely approved and well studied. Most are not.
- Every card below links to the full, sourced profile so you can check the receipts yourself.
How to read this
Each card names a situation you might actually have, the peptides people reach for, and a quick honesty rating hidden in the wording. When you see “approved” we mean a real regulator signed off (somewhere). When you see “animal data” or “thin evidence,” we mean the excitement is running ahead of the proof. Tap any tag to open the receipts.
There's a peptide for…
Weight & appetite
The big one — and, refreshingly, the well-proven one. The GLP-1 class genuinely moves the needle in large trials, with real approved options.
Recovery & healing
The internet's favorite corner. Wildly popular for tendons and joints — on evidence that's almost entirely from animals. Great biology, thin human proof.
Skin & anti-aging
The one that's probably in your skincare already. Lovely lab biology, modest human evidence, and a low-drama safety profile since it's topical.
Sleep & stress
Named after sleep, marketed for sleep — and surprisingly thin on proof that it delivers sleep. A good lesson in evocative names.
Metabolism & mitochondria
The peptides that talk to your cellular power plants. Genuinely interesting science; mostly animal data, with one that's actually been through trials.
Focus & mood
The Russian nootropic corner — genuinely approved (in Russia) with real but hard-to-read evidence, since much of it isn't in English.
Growth hormone & recovery
Nudge your body to release its own growth hormone instead of injecting it. A crowded field with one genuinely approved member.
Tanning
A tan from a vial. One version is FDA-approved for a rare medical condition; the popular one is unapproved and comes with a side of caution.
Libido & arousal
The one that works in the brain rather than the bloodstream — and, unusually, one form is actually FDA-approved for a specific use.
Muscle & body composition
Where the hype runs hottest and the human proof runs thinnest. Spectacular in mice, complicated and risky in people. Tread carefully.
Immune & inflammation
From a genuinely approved immune modulator (in many countries) to small anti-inflammatory fragments with mostly preclinical support.
Reproductive signaling
The peptides that talk to the reproductive axis — one with real approved uses, one that's a hot research target but still investigational.
The reality check (read this part)
Fun over. Here's the honest footer to all of the above: “there's a peptide for that” is a marketing feeling, not a medical fact. A few of these — the GLP-1 drugs, a couple of approved ones — are backed by serious human trials. Most are somewhere between “promising in a dish” and “my buddy swears by it,” and a fair number are sold as unapproved research chemicals whose actual contents are a separate question entirely.
So use this page as a map, not a shopping list. Before you get attached to any of these:
- Read the full profile — each links its sources so you can see how strong (or thin) the evidence really is.
- Learn to read the research yourself, so “a study showed” stops impressing you until you've checked which study.
- Understand sourcing & safety and how a COA works — purity and identity matter as much as the molecule.
- Talk to a qualified clinician about your situation. A website can't.
If a peptide sounds like it solves your exact problem perfectly, that's the moment to slow down and read the profile — not speed up and buy. The best outcomes here come from patience and receipts, not enthusiasm.
FAQ
QSo which one should I take?
That's exactly the question we can't answer — and neither can a stranger online. This page shows what people discuss for different situations; whether any of it is right (or safe) for you is a conversation with a clinician who knows your history.
QAre any of these actually proven?
Yes — the GLP-1 class (semaglutide, tirzepatide) has large trials and approvals, and a few others (tesamorelin, afamelanotide, PT-141) are approved for specific uses. Most of the rest are investigational.
QI'm brand new. Where do I actually start?
The beginner orientation, then the basics. Learn the vocabulary and how to weigh evidence before you fall for any single compound's fan club.
Questions & comments
No account, no login — leave a name or stay anonymous. Which situation did we miss? Add it below.