The directory
Every peptide, explained simply.
A plain-English guide to 53+ peptides — from skincare ingredients to research chemicals to approved medicines. For each one we explain what it is, what it’s studied for, how strong the evidence really is, and whether it’s legal and safe. No hype, and no dosing or “how-to.”
Healing & Recovery
Peptides studied in the context of tissue repair, gut health, and recovery. Mostly early or animal research.
ARA-290
ResearchCibinetideNerve pain, small-fibre neuropathy, and sarcoidosis-related nerve damage
BPC-157
ResearchBody Protection Compound-157Tissue, tendon, and gut healing
KPV
ResearchLysine-Proline-ValineCalming inflammation, gut inflammation (IBD), and immune modulation
Larazotide
ResearchAT-1001Tightening the gut lining ('leaky gut' / tight junctions)
LL-37
ResearchCathelicidin LL-37Fighting microbes and helping wounds heal
TB-500
ResearchThymosin Beta-4 fragmentTissue repair, wound healing, and injury recovery
Thymosin Alpha-1
ResearchTα1Supporting and balancing the immune system
Metabolic & Weight
Includes approved GLP-1 medicines and experimental peptides linked to metabolism, blood sugar, and fat.
Amycretin
ResearchNNC0487-0111Weight loss and blood sugar control (obesity and type 2 diabetes)
AOD-9604
ResearchAOD9604Fat loss / weight (development stalled after weak trial results)
Cagrilintide
ResearchAM833Weight loss and appetite control (often tested with semaglutide as 'CagriSema')
Ecnoglutide
ResearchXW003Obesity / weight loss and type 2 diabetes
Efinopegdutide
ResearchMK-6024MASH and MASLD (forms of fatty liver disease), and obesity
Liraglutide
ApprovedSaxendaType 2 diabetes and chronic (long-term) weight management
MariTide
Researchmaridebart cafraglutideObesity / weight loss and type 2 diabetes
Mazdutide
ResearchIBI362Obesity / weight loss and type 2 diabetes
MOTS-c
ResearchMitochondrial ORF of the 12S rRNA type-CMetabolism, insulin sensitivity, exercise / energy
Orforglipron
ApprovedFoundayo (US brand name)Obesity / weight management and type 2 diabetes
Pemvidutide
ResearchALT-801Obesity, fatty liver disease (MASH/MASLD), and more recently alcohol-related conditions
Petrelintide
ResearchZP8396Weight loss and weight management, including in people with type 2 diabetes
Pramlintide
ApprovedSymlinBlood sugar control at mealtimes in type 1 and type 2 diabetes, alongside insulin
Retatrutide
ResearchLY3437943Obesity / weight loss and type 2 diabetes
Semaglutide
ApprovedOzempicType 2 diabetes and chronic (long-term) weight management
Survodutide
ResearchBI 456906Obesity / weight loss and MASH (a fatty liver disease)
Tesamorelin
ApprovedEgriftaReducing excess belly fat in HIV-associated lipodystrophy
Tirzepatide
ApprovedMounjaroType 2 diabetes and weight management
VK2735
ResearchVK-2735Obesity and weight management (injection and oral tablet forms)
Growth Hormone & Muscle
Peptides connected to growth-hormone pathways and muscle. Ranges from approved drugs to unapproved research chemicals.
CJC-1295
ResearchMod GRF 1-29 (no-DAC form)Raising growth hormone / IGF-1, body composition, sleep
Follistatin-344
ResearchFS-344Blocking myostatin to allow more muscle growth
GHRP-2
ResearchGrowth Hormone Releasing Peptide-2Triggering growth hormone release
GHRP-6
ResearchGrowth Hormone Releasing Peptide-6Triggering growth hormone release
HCG
ApprovedHuman Chorionic GonadotropinFertility treatment; certain male hormonal problems
Hexarelin
ResearchExamorelinTriggering growth hormone release
IGF-1 LR3
ResearchLong R3 IGF-1Muscle growth and cell growth
Ipamorelin
ResearchGrowth hormone release, body composition, recovery, sleep
Sermorelin
ApprovedGerefPrompting the body to release its own growth hormone
Longevity & Cellular
Peptides and cofactors studied for ageing, cellular energy, and repair. Evidence is mostly preliminary.
Epitalon
ResearchEpithalonAgeing, telomeres, and sleep
Humanin
ResearchHNAgeing, brain protection, and how the body handles energy
NAD+
SupplementNicotinamide adenine dinucleotideCellular energy, ageing, and DNA repair
Pinealon
ResearchEDR peptideMemory, brain ageing, and neuroprotection
SS-31
ResearchElamipretideMitochondrial disease, heart and eye conditions, cellular energy
Thymalin
ResearchThymalinumImmune function and ageing
Vilon
ResearchKE peptideImmune function, cell ageing, and skin ageing
Focus & Mood
Peptides studied for focus, stress, and mood — largely developed and researched outside the US.
Cerebrolysin
ResearchFPF-1070Stroke, dementia, and traumatic brain injury
Cortexin
ResearchKorteksinStroke recovery, memory, cognitive decline, and brain injury
Dihexa
ResearchN-hexanoic-Tyr-Ile-(6) aminohexanoic amideSynapse formation, memory, and cognition in animal models of dementia
DSIP
ResearchDelta Sleep-Inducing PeptideSleep, and the body's stress and hormone systems
Selank
ResearchTuftsin analogAnxiety, stress, and calm focus
Semax
ResearchACTH(4-10) analogFocus, memory, neuroprotection, and stroke recovery
Sexual Health & Libido
Peptides linked to sex drive, arousal, and reproductive hormones — one is an approved medicine, the rest are research chemicals.
Gonadorelin
ApprovedGnRHFertility, hormone testing/diagnosis, and supporting the body's own sex-hormone signals
Kisspeptin
ResearchKisspeptin-54Libido, arousal, and fertility
Melanotan-2
ResearchMT-2Tanning and libido
Oxytocin
ApprovedPitocinLabor and breastfeeding (approved); bonding, anxiety, and social connection (research/off-label)
PT-141
ApprovedBremelanotideLow sexual desire and arousal
Skin & Cosmetic
Peptides used topically in skincare — regulated as cosmetics and limited to claims about how skin looks. These have their own in-depth guides.
GHK-Cu (Copper Peptides)
CosmeticThe look of firmer, smoother skin
Matrixyl
CosmeticThe look of fine lines and firmness
Argireline
CosmeticThe look of softer expression lines
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