Peptide guide
Every peptide, mapped to the body
Pick a body area to see the peptides buyers use for it, how strong the evidence really is, and, for most of them, lab results by vendor.
- 25
- peptides
- 7
- body areas
- 6
- evidence levels
For research use only. Vendors can't pay to change their score, rank or warnings. No affiliate links, no coupon codes, no paid rankings. How scores work
Explore by body area
Pick an area to filter the peptides below.
How to read the evidence labels
6 levels, from strongest to weakest. Each card shows the strongest evidence for the compound's main claimed use.
- Approved drugApproved by the FDA for at least one use (the vials buyers test are research versions, not the approved product).
- Approved outside the USApproved as a medicine in other countries, not in the US.
- Human trialsTested in controlled human trials, whatever the result.
- Early human dataSmall, pilot or uncontrolled human studies only.
- Animal/lab onlyEvidence comes from animals or cells; effects in people are unproven.
- AnecdotalUser reports only; no published studies.
25 peptides
BPC-157
Animal/lab only- Bones / muscles
- Immune
- Digestive / weight
- +1
Synthetic peptide based on a gastric protein sequence; studied for tendon, muscle and gut healing, almost entirely in animals.
Semax
Approved outside the US- Brain
- Heart
- Digestive / weight
- +1
Synthetic ACTH fragment analogue approved in Russia, used there for stroke recovery and cognition.
Selank
Early human data- Brain
- Heart
- Digestive / weight
Russian-developed tuftsin analogue studied for anxiety; the clinical evidence is a few small Russian trials without a placebo group, plus a placebo-controlled brain-imaging study in healthy adults.
TB-500
Animal/lab only- Bones / muscles
- Skin
- Digestive / weight
- +1
Synthetic peptide related to thymosin beta-4, sold for injury recovery; the research is on thymosin beta-4 and in animals.
GHK-Cu
Early human data- Skin
- Bones / muscles
- Digestive / weight
- +1
Copper-binding peptide found in human plasma; studied mainly in skincare, with little data on injection.
Retatrutide
Human trials- Digestive / weight
- Bones / muscles
- Heart
- +1
Eli Lilly's investigational triple agonist (GIP, GLP-1 and glucagon receptors), several Phase 3 obesity and diabetes trials have reported, and it is not yet approved.
Tirzepatide
Approved drug- Digestive / weight
- Bones / muscles
- Skin
GIP and GLP-1 receptor agonist; approved as Mounjaro and Zepbound for type 2 diabetes and weight management.
Sermorelin
Approved drugUS product discontinued
- Bones / muscles
- Digestive / weight
- Brain
- +2
Short GHRH analogue once FDA-approved for growth hormone deficiency in children.
Tesamorelin
Approved drug- Bones / muscles
- Digestive / weight
- Sexual / reproductive
- +1
Growth hormone-releasing hormone analogue; approved as Egrifta to reduce abdominal fat in HIV-associated lipodystrophy.
Cagrilintide
Human trials- Digestive / weight
- Bones / muscles
- Heart
Long-acting amylin analogue from Novo Nordisk, studied alone and combined with semaglutide for weight loss.
PT-141
Approved drug- Sexual / reproductive
- Immune
- Skin
- +1
Bremelanotide; approved as Vyleesi for low sexual desire in premenopausal women.
SS-31
Approved drug- Heart
- Digestive / weight
- Bones / muscles
- +1
Elamipretide, a mitochondria-targeted peptide; granted FDA accelerated approval as Forzinity for Barth syndrome in 2025.
Epitalon
Animal/lab only- Brain
- Skin
- Heart
- +3
Synthetic tetrapeptide from pineal gland research, promoted for aging; evidence comes mostly from animals and one research group.
Thymosin Alpha-1
Approved outside the US- Immune
- Digestive / weight
- Bones / muscles
Thymic peptide (thymalfasin) approved in a number of countries, not the US, mainly for hepatitis B; its largest sepsis trial was negative.
Pinealon
Animal/lab only- Brain
- Sexual / reproductive
- Skin
Short synthetic peptide from the same research group as Epitalon, promoted for brain aging.
KPV
Animal/lab only- Immune
- Bones / muscles
- Skin
- +1
Tripeptide fragment of alpha-MSH studied for anti-inflammatory effects, including in gut inflammation models.
Ipamorelin
Human trials- Bones / muscles
- Brain
- Digestive / weight
- +1
Selective growth hormone secretagogue (ghrelin receptor agonist), often paired with CJC-1295.
CJC-1295
Early human data- Bones / muscles
- Brain
- Digestive / weight
- +1
Long-acting growth hormone-releasing hormone analogue; the version without DAC is shorter-acting.
Semaglutide
Approved drug- Digestive / weight
- Brain
- Skin
GLP-1 receptor agonist; approved as Ozempic and Wegovy for type 2 diabetes and weight management.
LL-37
Early human data- Immune
- Bones / muscles
- Digestive / weight
Human antimicrobial peptide (cathelicidin) studied as a topical gel for chronic leg ulcers; its infection claims come from lab studies.
DSIP
Early human data- Brain
- Bones / muscles
- Heart
- +1
Delta sleep-inducing peptide; small, mostly 1980s–90s sleep studies gave inconsistent results, and the positive ones came largely from one group.
Melanotan II
Early human data- Skin
- Sexual / reproductive
- Brain
- +1
Synthetic melanocortin agonist that darkens skin and affects libido; unapproved, with safety concerns.
AOD-9604
Human trials- Bones / muscles
- Digestive / weight
- Heart
Fragment of human growth hormone developed for fat loss; human trials did not show meaningful weight loss.
Kisspeptin-10
Human trials- Sexual / reproductive
- Digestive / weight
- Bones / muscles
Fragment of kisspeptin, a hormone that switches on the reproductive axis; used in human research studies.
GHRP-6
Early human data- Digestive / weight
- Bones / muscles
- Brain
One of the first growth hormone-releasing peptides; acts on the ghrelin (hunger) receptor, and raises cortisol and prolactin as well as growth hormone.
Not peptides, so not on the map: NAD+ (coenzyme, not a peptide); 5-Amino-1MQ (not a peptide).