Peptide Directory
Reference · The Peptide Directory
Every peptide, in plain English.
A no-jargon guide to the most talked-about peptides, bioregulators, tripeptides and dipeptides. Filter by what it's studied for, then open any row for the full story — what researchers are looking at, and what's still being tested.
Retatrutide"triple G"Weight loss · triple agonistWeight & Metabolism
One of the newest weight-loss compounds. It copies three of the body's own "I'm full / burn fuel" signals at the same time.
Because it flips three switches at once (GLP-1, GIP and glucagon), scientists call it a "triple agonist." In trials it has produced some of the largest average weight loss reported for this type of compound.
Research status: Investigational — still in clinical trials, not approved.
View in catalog →TirzepatideMounjaro / ZepboundWeight loss + blood sugar · dual agonistWeight & Metabolism
Copies two of the body's fullness-and-blood-sugar signals to lower appetite and steady blood sugar.
A "dual agonist" (GLP-1 + GIP). Widely studied for weight loss and type-2 blood-sugar control, and one of the most talked-about compounds in the category.
Research status: Approved as a medicine in several countries for specific uses.
View in catalog →SemaglutideOzempic / WegovyWeight loss + blood sugar · GLP-1Weight & Metabolism
Mimics a natural gut hormone that tells your brain you're full, so you eat less.
The best-known GLP-1 compound. Heavily studied for weight loss and blood-sugar control. It's the reference point most newer compounds are compared against.
Research status: Approved as a medicine in several countries for specific uses.
View in catalog →SurvodutideWeight loss · GLP-1 + glucagonWeight & Metabolism
Copies two signals — one that curbs appetite and one that helps the body burn fuel.
A dual GLP-1/glucagon compound studied for weight loss and, in research, for fatty-liver questions.
Research status: Investigational — in clinical trials.
View in catalog →MazdutideWeight loss · GLP-1 + glucagonWeight & Metabolism
Another two-signal compound aimed at appetite and fuel-burning.
A GLP-1/glucagon dual compound studied mainly for weight loss and blood sugar, with much of the early research coming out of trials in China.
Research status: Investigational — in clinical trials.
View in catalog →CagrilintideAppetite control · amylinWeight & Metabolism
Copies "amylin," a natural signal that helps you feel full and slows how fast the stomach empties.
Often studied alongside semaglutide. On its own it's researched for appetite and weight; paired with semaglutide it becomes CagriSema.
Research status: Investigational — in clinical trials.
View in catalog →CagriSemaWeight loss comboWeight & Metabolism
Two appetite signals working together — cagrilintide plus semaglutide.
A research combination pairing an amylin copy with a GLP-1 copy, studied for larger weight loss than either alone.
Research status: Investigational — in clinical trials.
View in catalog →MOTS-cMetabolism · "exercise mimic"Weight & Metabolism
A tiny signal made by your mitochondria that seems tied to how the body handles fuel.
Studied as a metabolism and exercise-related peptide — researchers look at how it affects energy use and insulin sensitivity in lab and animal models.
Research status: Early research — mostly lab and animal studies.
View in catalog →AOD-9604Fat metabolismWeight & Metabolism
A small piece of the growth-hormone molecule studied for its effect on fat.
The tail-end fragment of growth hormone, researched for fat breakdown without the blood-sugar effects of full growth hormone.
Research status: Investigational — limited human data.
View in catalog →HGH Fragment 176-191Fat-loss fragmentWeight & Metabolism
A trimmed-down piece of growth hormone, studied mainly for fat.
Closely related to AOD-9604, researched for fat metabolism specifically, separate from growth hormone's other jobs.
Research status: Early research.
View in catalog →5-Amino-1MQMetabolism · fat cellsWeight & Metabolism
A small molecule studied for switching off an enzyme that lets fat cells store extra fuel.
Not a peptide, but popular in the same world. Researchers study its target (an enzyme called NNMT) for effects on fat cells and energy in lab and animal work.
Research status: Early research — lab and animal studies.
View in catalog →SLU-PP-332Metabolism · "exercise in a molecule"Weight & Metabolism
An experimental compound studied for pushing cells to burn more energy, a bit like a workout does.
Researchers study it in animal models for how it affects energy use and endurance without exercise.
Research status: Early research — animal studies.
View in catalog →Lipo-BFat metabolism · B-vitamin blendWeight & Metabolism
A blend of B-vitamins and fat-metabolism helpers, studied together for how the body handles fat.
Often called a "lipotropic" blend. The components are studied for their roles in fat processing and energy metabolism.
Research status: Blend of established compounds.
View in catalog →BPC-157Recovery · gut & tissueRecovery & Repair
A lab-made copy of a protective substance found in the stomach, studied for healing and recovery.
One of the most searched research peptides. Animal and lab studies look at tendon, gut-lining and tissue recovery. Human evidence is still limited.
Research status: Research peptide — not an approved medicine.
View in catalog →TB-500Thymosin Beta-4Recovery · flexibilityRecovery & Repair
Copies a natural protein involved in cell movement and repair.
Studied alongside BPC-157 for recovery and flexibility. Most evidence is from lab and animal research on wound-healing and tissue repair.
Research status: Research peptide — not an approved medicine.
View in catalog →KPVCalms inflammation · tripeptideRecovery & Repair
A tiny three-piece peptide studied for calming redness and irritation.
KPV is a fragment of a natural hormone. Research looks at its anti-inflammatory behaviour, including in gut-irritation models.
Research status: Early research.
View in catalog →CartalaxJoints & cartilage · bioregulatorRecovery & Repair
A short bioregulator peptide aimed at cartilage and joints.
Part of the Khavinson bioregulator family, researched for connective-tissue support in lab studies.
Research status: Studied mainly in Russian research.
View in catalog →Ara-290Nerve comfort · EPO fragmentRecovery & Repair
An experimental peptide based on a piece of the body's natural EPO signal.
Researchers study it for calming nerve-related discomfort and inflammation, separate from EPO's blood-building role.
Research status: Investigational.
View in catalog →IpamorelinGrowth-hormone nudge · gentleGrowth Hormone
A gentle nudge that asks the body to release a little more of its own growth hormone.
A "secretagogue" — it doesn't add growth hormone, it signals the body to make its own pulse of it. Popular in research for being selective and mild.
Research status: Research peptide.
View in catalog →CJC-1295Growth-hormone nudge · long-actingGrowth Hormone
Another growth-hormone nudge, built to last longer in the body.
Often studied together with ipamorelin. It extends the natural growth-hormone signal so the pulses are larger and steadier.
Research status: Research peptide.
View in catalog →TesamorelinBelly fat · growth-hormone signalGrowth Hormone
A growth-hormone-releasing signal researched for deep belly fat.
Studied specifically for visceral fat (the deep fat around organs). It nudges the body's own growth-hormone release.
Research status: Approved for a specific medical use; also studied more broadly.
View in catalog →SermorelinGrowth-hormone nudge · classicGrowth Hormone
One of the original growth-hormone-releasing signals.
An older, well-studied secretagogue that prompts the body's own growth-hormone pulse. Often a reference point for newer ones.
Research status: Studied for decades; used medically in some settings.
Educational entry — not currently in the catalog.HexarelinGrowth-hormone nudge · strongGrowth Hormone
A stronger nudge peptide that asks the body to release growth hormone.
Studied for recovery and performance. Known in research for being one of the more potent secretagogues.
Research status: Research peptide.
View in catalog →GHRP-2Growth-hormone nudge · classicGrowth Hormone
A classic growth-hormone nudge that signals a pulse rather than adding hormone.
One of the well-established secretagogues, frequently used as a comparison point in growth-hormone research.
Research status: Research peptide.
View in catalog →GHRP-6Growth-hormone nudge · appetiteGrowth Hormone
Similar to GHRP-2, and also known in research for strongly increasing hunger.
Studied both for growth-hormone release and for its pronounced effect on appetite signalling.
Research status: Research peptide.
View in catalog →IGF-DESMuscle-cell growthGrowth Hormone
A short-acting version of IGF-1, a natural growth signal.
Researchers study it for muscle-cell growth and localised recovery.
Research status: Research peptide.
View in catalog →MGFMuscle repair after exerciseGrowth Hormone
Short for "Mechano Growth Factor" — a natural signal muscles make after exercise.
Studied for muscle repair and growth following mechanical stress.
Research status: Research peptide.
View in catalog →FollistatinMuscle · myostatin blockerGrowth Hormone
A natural protein studied for muscle, by blocking the body's built-in brake on muscle growth.
Research focuses on its interaction with myostatin, the signal that limits how much muscle the body builds.
Research status: Research protein.
View in catalog →GHK-Cucopper peptideSkin, hair & collagen · copper tripeptideSkin & Longevity
A tiny copper-carrying peptide famous in skincare for collagen and repair.
A three-piece peptide bound to copper. Widely researched for skin firmness, wound repair and hair, and common in high-end cosmetics.
Research status: Well-studied in skin research; common in cosmetics.
View in catalog →AHK-CuHair · copper peptideSkin & Longevity
A copper peptide cousin of GHK-Cu, studied mainly for hair.
Cosmetic research looks at its role in hair thickness and growth signalling.
Research status: Cosmetic research.
View in catalog →Snap-8Expression lines · cosmetic peptideSkin & Longevity
A cosmetic peptide studied for softening the look of expression lines.
Sometimes described in skincare research as a topical alternative approach to relaxing fine lines.
Research status: Cosmetic research.
View in catalog →GlutathioneAntioxidant · tripeptideSkin & Longevity
The body's own "master antioxidant" — and yes, it's a three-piece peptide.
Made of three amino acids, it's studied for mopping up cell stress and supporting the liver's clean-up work.
Research status: Naturally made by the body; widely researched.
View in catalog →NAD+Cell energy & longevitySkin & Longevity
A helper molecule your cells use to make energy; levels fall as we age.
Not a peptide, but a longevity favourite. Research looks at how topping it up affects cell energy, repair and aging markers.
Research status: Active area of aging research.
View in catalog →SS-31ElamipretideCell energy · mitochondriaSkin & Longevity
Studied for helping the tiny "batteries" inside cells run more cleanly.
Targets the mitochondria. Researched in aging, heart and muscle-energy questions where the cell's power plants aren't working well.
Research status: Investigational — in clinical trials.
View in catalog →FOXO4-DRILongevity research · senolyticSkin & Longevity
An experimental peptide studied for clearing out worn-out "zombie" cells.
A "senolytic" idea — in animal studies it's researched for removing senescent cells that build up with age. Very early-stage science.
Research status: Experimental — mostly animal research.
View in catalog →SemaxFocus & clarityBrain & Mood
A brain peptide from Russia studied for focus, memory and mental stamina.
Researched for attention and protecting brain cells under stress. Most human studies come from Russian clinical research.
Research status: Used medically in Russia; studied elsewhere as research.
View in catalog →SelankCalm & steady moodBrain & Mood
A cousin of Semax, studied for calm without the drowsy feeling.
Researched for easing anxiety-like states and steadying mood. Like Semax, most human data is from Russian research.
Research status: Used medically in Russia; studied elsewhere as research.
View in catalog →CerebrolysinMemory & brain-cell protectionBrain & Mood
A mix of small brain-supporting peptides studied for memory and protecting brain cells.
Has a long history in brain research, mostly outside the US, particularly in recovery and cognitive studies.
Research status: Used medically in some countries.
View in catalog →DSIPDeep sleepBrain & Mood
Short for "Delta Sleep-Inducing Peptide" — the name says it.
Researchers study it for deep sleep phases and the body's stress-hormone response.
Research status: Research peptide.
View in catalog →PE-22-28MoodBrain & Mood
An experimental peptide studied for mood.
Research looks at fast-acting effects on low mood in animal models.
Research status: Experimental — animal research.
View in catalog →P21P021Brain support · new-cell growthBrain & Mood
An experimental peptide studied for helping the brain grow new connections.
Researched in animal models for encouraging new brain-cell growth and protecting memory.
Research status: Experimental — animal research.
View in catalog →DihexaLearning & memoryBrain & Mood
A small compound studied for building new connections between brain cells.
Researched in animal models for memory and the growth of new synapses (the links between brain cells).
Research status: Experimental — animal research.
Educational entry — not currently in the catalog.PT-141BremelanotideLibidoSexual Health
Works through brain signals — studied for desire rather than blood flow.
Unlike blue-pill type compounds, it acts on brain pathways linked to sexual desire. Studied in both men and women.
Research status: Approved for a specific use in some places.
View in catalog →Melanotan IITanning (and libido)Sexual Health
Best known for darkening skin tone; also studied for libido.
It nudges the pigment system to build a tan with less sun, and touches the same desire pathways as PT-141. Comes with real safety questions in research.
Research status: Not approved — notable safety concerns.
View in catalog →MT-1Melanotan 1Tanning · skin pigmentSexual Health
A peptide studied for skin pigment with less sun exposure.
Related to Melanotan II but studied as more selective for pigment. Also carries safety questions in research.
Research status: Not approved — safety questions remain.
View in catalog →OxytocinBonding & moodSexual Health
The natural "connection" hormone tied to trust, warmth and calm.
Researched for bonding, mood and social connection. It's a natural hormone the body already makes.
Research status: Natural hormone; used medically for specific purposes.
View in catalog →Kisspeptin-10Fertility signalSexual Health
A master "start" signal for the body's reproductive hormones.
Studied for how it kicks off the hormone chain behind fertility, and for its role in desire pathways.
Research status: Active research area in fertility science.
View in catalog →HMGFertility hormoneSexual Health
Short for Human Menopausal Gonadotropin, used in fertility research.
Studied in hormone and fertility research for its role in stimulating reproductive signalling.
Research status: Used medically for specific purposes.
View in catalog →EpithalonEpitalonLongevity & sleep · bioregulatorBioregulators
A famous four-piece "bioregulator" studied for aging and sleep rhythm.
One of the Khavinson peptide bioregulators. Research looks at telomeres (the caps on our DNA), the sleep-hormone melatonin, and aging markers.
Research status: Studied mainly in Russian longevity research.
View in catalog →PinealonBrain bioregulator · tripeptideBioregulators
A three-piece bioregulator studied for the brain and mental sharpness.
Part of the Khavinson bioregulator family, researched for protecting brain cells and supporting focus in animal and lab studies.
Research status: Studied mainly in Russian research.
View in catalog →VilonImmune/longevity bioregulator · dipeptideBioregulators
One of the simplest bioregulators — just two building blocks.
A two-piece (dipeptide) bioregulator researched for immune balance and aging markers in lab studies.
Research status: Studied mainly in Russian research.
Educational entry — not currently in the catalog.CarnosineAntioxidant · dipeptideBioregulators
A natural two-piece peptide found in muscle, studied as an antioxidant.
Made of two amino acids, it's researched for buffering cell stress and its possible role in muscle and aging.
Research status: Naturally present in the body; widely studied.
Educational entry — not currently in the catalog.BronchogenLungs & airways · bioregulatorBioregulators
A short bioregulator peptide aimed at the lungs and airways.
From the tissue-specific Khavinson family, studied for breathing-tissue support.
Research status: Studied mainly in Russian research.
View in catalog →CardiogenHeart & vessels · bioregulatorBioregulators
A short bioregulator peptide aimed at the heart and blood vessels.
From the tissue-specific Khavinson family, studied for cardiovascular tissue support.
Research status: Studied mainly in Russian research.
View in catalog →OvagenLiver & digestion · bioregulatorBioregulators
A short bioregulator peptide studied for the liver and digestion.
Part of the Khavinson tissue-specific family of short peptides.
Research status: Studied mainly in Russian research.
View in catalog →ProstamaxProstate · bioregulatorBioregulators
A short bioregulator peptide aimed at the prostate.
From the tissue-specific Khavinson family of short regulatory peptides.
Research status: Studied mainly in Russian research.
View in catalog →ThymalinImmune balance · bioregulatorImmune
A thymus-gland bioregulator studied for tuning the immune system.
Researched for helping an aging or stressed immune system work in a more balanced way.
Research status: Studied mainly in Russian research.
View in catalog →TA-1Thymosin Alpha-1Immune supportImmune
A natural immune-signaling peptide studied for steadying the body's defenses.
Researched for supporting immune response, including in infection and immune-balance studies.
Research status: Used medically in some countries; researched elsewhere.
View in catalog →VIPvasoactive intestinal peptideCalms inflammationImmune
A natural peptide studied for calming inflammation and relaxing airways.
Researched for its anti-inflammatory role and effects on breathing passages and immune signaling.
Research status: Research peptide.
View in catalog →PNC-27Lab cancer-cell researchImmune
A purely experimental peptide used in laboratory cancer-cell studies.
Strictly a research tool. Scientists study how it behaves toward certain cancer cells in the lab. Early, lab-only science.
Research status: Laboratory research only.
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