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Popular Peptides
The most-searched peptides — what they do, the evidence, and where they fit.
BPC-157
Gut, tendon, and ligament healing — the recovery peptide
MOTS-c
Mitochondrial peptide — longevity + metabolic health
Retatrutide
Triple-agonist weight loss — the next-gen GLP-1
Tirzepatide
GLP-1 + GIP dual-agonist — proven fat loss
5-Amino-1MQ
NNMT inhibitor — metabolism + fat-loss research
GHK-Cu
Skin, collagen, and anti-aging — copper peptide
Popular Dosing Guides
Protocols, doses, and cycles — our most-read peptide guides.
KLOW Dosing
Blend ratios, dosing & cycle length
Retatrutide Dosing
Titration 1→12mg, weekly cadence & cycle length
Tirzepatide Dosing
Dose tiers, frequency & titration schedule
MOTS-c Dosing
Standard doses, frequency & cycling
BPC-157 Dosing
Daily dosing, routes & duration
CJC-1295 + Ipamorelin Dosing
Blend dosing, timing & frequency
Peptide Fundamentals
Start here — the core knowledge every reader needs before buying.
Buying Guides
Where to source, vendor + COA notes — start here if you're ready to buy
Dosing Guides
Protocols, frequency, cycles — how to dose every peptide we cover
Reconstitution
Mixing, storage, and BAC water math — get every shot right
Results & Timeline
What to expect week by week — realistic outcomes, not hype
Side Effects
What to watch for, how to manage, when to stop — safety first
Top Picks
Curated blends and single peptides we recommend most — go straight to vendor pricing.
Wolverine Stack
BlendBPC-157 + TB-500 — full-body healing
KLOW Blend
BlendKPV + LL-37 + Oxytocin + Wolverine — gut + immune
CJC-1295 + Ipamorelin
BlendSynergistic GH release — the classic stack
Retatrutide
Triple-agonist weight loss — next-gen GLP-1
Tirzepatide
GLP-1 + GIP dual-agonist — proven fat loss
GLOW Blend
BlendGHK-Cu + LL-37 + Oxytocin + Wolverine — skin + collagen
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One vendor sells 60mg vials at half the per-mg cost of 12mg — but COA matters more than price. Vial sizes, cost per week, and vendor scores.
All Peptides A–Z
The complete directory — every peptide we cover, alphabetical.
5-Amino-1MQ
Weight Loss
5-Amino-1MQ is a small molecule that inhibits NNMT (nicotinamide N-methyltransferase), an enzyme linked to fat accumulation and metabolic dysfunction. By blocking NNMT, it may increase NAD+ levels, boost cellular energy, promote fat loss, and support metabolic health. Studied for obesity, type 2 diabetes, and longevity applications.
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Adamax
Cognitive
Adamax is an adamantane-modified analog of Semax (an ACTH(4-10)-derived nootropic peptide), marketed for cognition and neuroprotection; Adamax itself has essentially no dedicated published research.
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AHK-Cu
Healing
AHK-Cu is a copper-binding tripeptide (Ala-His-Lys complexed with copper) studied primarily for hair growth and follicle stimulation, the copper-peptide cousin of GHK-Cu. Used in topical research formulations for hair and skin.
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AICAR
Longevity
AICAR (acadesine) is an investigational AMPK-activating compound studied as an exercise mimetic for endurance and fat metabolism.
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AOD-9604
Weight Loss
AOD-9604 is a modified fragment of human growth hormone (HGH fragment 176-191) studied for fat metabolism and weight loss. It mimics GH's lipolytic effects without affecting blood sugar or growth. Previously in clinical trials for obesity; now popular in research settings.
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ARA-290
Healing
EPO-derived innate repair receptor agonist studied for neuropathic pain and tissue protection.
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BPC-157
Healing
BPC-157 (Body Protection Compound-157) is a synthetic peptide derived from a protein found in gastric juice. Studied extensively for tissue repair, wound healing, and anti-inflammatory effects. Popular in research for tendon, ligament, muscle, and gut healing applications.
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Bronchogen
Longevity
Bronchogen is a bronchial peptide bioregulator studied for respiratory tissue support.
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Cagrilintide
Weight Loss
Cagrilintide is Novo Nordisk's long-acting amylin analog designed for weight management. Phase 2 trials showed 11.8% body weight loss as monotherapy and up to 17.1% when combined with semaglutide (CagriSema). Works by enhancing satiety and slowing gastric emptying through amylin receptor activation.
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Cardiogen
Longevity
A Khavinson cardiac peptide bioregulator — the synthetic tetrapeptide Ala-Glu-Asp-Arg (AEDR) studied in review and cell-transport work for a proposed role in cardiovascular gene regulation. Preclinical and mechanistic only, no human trials.
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Cartalax
Healing
A synthetic Khavinson tripeptide (Ala-Glu-Asp) studied in preclinical cell models for cartilage and connective-tissue gene regulation.
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Cerebrolysin
Cognitive
Cerebrolysin is a porcine-brain-derived neuropeptide mixture given by injection, studied for stroke, TBI, and dementia; evidence is real but contested.
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CJC-1295
Growth Hormone (GHRH)
CJC-1295 (also known as Mod GRF 1-29) is a modified GHRH analog with four amino acid substitutions that improve stability. With a short ~30 minute half-life, it mimics natural pulsatile GH release patterns. Often combined with GHRPs like Ipamorelin for synergistic effects.
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CJC-1295 with DAC
Growth Hormone (GHRH)
CJC-1295 with DAC (Drug Affinity Complex) is a long-acting GHRH analog that binds to albumin, extending its half-life to 6-8 days. This allows for less frequent dosing compared to CJC-1295 without DAC, providing sustained GH elevation rather than pulsatile release.
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Cortagen
Cognitive
Cortagen is a cerebral-cortex peptide bioregulator from the Russian cytomedin class, studied for neuroprotection and CNS support.
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Dihexa
Cognitive
Angiotensin IV-derived research compound studied for synaptogenesis via the HGF/c-Met pathway. Preclinical and in-vitro only — no human trials, and the foundational mechanism papers were retracted in 2025.
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DSIP
Cognitive
DSIP (Delta Sleep-Inducing Peptide) is a 9-amino-acid neuropeptide that promotes slow-wave delta sleep and modulates stress hormone responses. Research shows improved sleep efficiency, reduced sleep latency, and stress-protective effects. Also studied for pain modulation and neuroendocrine regulation.
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Epitalon
Longevity
Epitalon (Epithalon) is a synthetic tetrapeptide studied for its effects on telomerase activation and potential anti-aging properties. Based on the pineal gland peptide Epithalamin. Researched for longevity, sleep regulation, and cellular health.
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Follistatin-344
Growth Factor
Follistatin-344 is a synthetic version of the naturally occurring follistatin protein that inhibits myostatin and activin signaling. By blocking these muscle-growth suppressors, it promotes significant increases in lean muscle mass. Widely researched for muscle-wasting conditions, athletic performance, and body composition.
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FOXO4-DRI
Longevity
FOXO4-DRI is a D-retro-inverso peptide that selectively eliminates senescent (zombie) cells by disrupting the FOXO4-p53 interaction. This senolytic mechanism triggers apoptosis specifically in damaged cells while sparing healthy ones. A cutting-edge anti-aging research compound based on the landmark 2017 Cell paper.
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GHK-Cu
Healing
GHK-Cu (Copper Peptide) is a naturally occurring tripeptide with a copper ion that declines with age. Researched for wound healing, skin regeneration, anti-aging, hair growth, and collagen synthesis. Available in topical and injectable forms for research.
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GHRP-2
Growth Hormone (GHRP)
GHRP-2 is a potent synthetic hexapeptide that stimulates growth hormone release through the ghrelin receptor (GHS-R). One of the strongest GHRPs available, it produces significant GH pulses with moderate effects on cortisol, prolactin, and appetite. Often stacked with GHRH peptides like CJC-1295 for synergistic effects.
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GHRP-6
Growth Hormone (GHRP)
GHRP-6 is the original growth hormone releasing peptide, a synthetic hexapeptide that strongly stimulates GH release through the ghrelin receptor. Known for significant appetite stimulation (hunger effect within 20-30 minutes), making it popular for bulking phases and hardgainers who need to increase caloric intake.
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Glutathione
Longevity
The body's master antioxidant — defends cells, supports immune function, and detoxifies
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Gonadorelin
Hormone
Synthetic GnRH decapeptide that signals the pituitary to release LH and FSH.
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HCG (Human Chorionic Gonadotropin)
Hormone
A glycoprotein hormone that mimics luteinizing hormone (LH), stimulating testicular testosterone production to preserve fertility and testicular size during testosterone therapy and in post-cycle protocols.
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Hexarelin
Growth Hormone (GHRP)
Hexarelin is one of the most potent GHRPs (Growth Hormone Releasing Peptides), producing strong GH pulses through the ghrelin receptor. More potent than GHRP-6 but with greater effects on cortisol and prolactin. Often used in research for its powerful GH-releasing properties.
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Humanin
Longevity
Humanin is a mitochondrial-derived peptide (MDP) with potent cytoprotective and neuroprotective effects. It protects cells from stress-induced death, improves insulin sensitivity, and has anti-inflammatory properties. Studied for Alzheimer's disease, diabetes, and aging-related conditions.
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IGF-1 LR3
Growth Factor
IGF-1 LR3 is a modified version of insulin-like growth factor 1 with an extended half-life (~20-30 hours vs minutes). The modifications make it more potent for muscle protein synthesis and less affected by IGF binding proteins. Used in research for muscle growth and recovery.
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Ipamorelin
Growth Hormone (GHRP)
Ipamorelin is one of the mildest and most selective growth hormone releasing peptides (GHRPs). It stimulates GH release through the ghrelin receptor without significantly affecting cortisol or prolactin levels, making it popular for those seeking cleaner GH elevation with fewer side effects.
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Kisspeptin
Hormone
Kisspeptin is a neuropeptide that acts as the master regulator of the reproductive hormone axis. It stimulates GnRH release from the hypothalamus, which triggers LH and FSH secretion. Used in fertility treatments, hormone optimization, and research into puberty and reproductive disorders. Also shows promise for metabolic regulation and mood.
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KPV
Immune
KPV is a tripeptide (Lys-Pro-Val) derived from alpha-melanocyte-stimulating hormone (α-MSH). It possesses potent anti-inflammatory and antimicrobial properties without the pigmentation effects of its parent molecule. Research focuses on inflammatory bowel disease, skin conditions, wound healing, and gut health. It reduces pro-inflammatory cytokines and modulates immune responses.
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L-Carnitine
Weight Loss
L-Carnitine is a naturally occurring amino-acid derivative that shuttles long-chain fatty acids into mitochondria for energy production. Studied for fat metabolism, exercise recovery, and energy, with extensive human data.
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Liraglutide
Weight Loss
Liraglutide is a GLP-1 receptor agonist FDA-approved for type 2 diabetes and weight management. The first GLP-1 approved for weight loss, it produces 5-10% body weight reduction. Requires daily injection due to its ~13 hour half-life, but has the longest safety track record among GLP-1 medications.
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LL-37
Healing
LL-37 is a human cathelicidin antimicrobial peptide that plays a role in innate immunity. Studied for its antimicrobial, immunomodulatory, and wound healing properties. Researched in contexts of infection, inflammation, and immune support.
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Melanotan I
Tanning
Melanotan I (Afamelanotide) is a synthetic analog of alpha-MSH that stimulates melanin production for skin tanning and photoprotection. FDA-approved for erythropoietic protoporphyria (EPP), a rare genetic condition causing extreme sun sensitivity. More selective than Melanotan II with a cleaner side effect profile.
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Melanotan II
Tanning
Melanotan II is a synthetic peptide that stimulates melanin production (tanning) and has effects on sexual function and appetite. More potent than Melanotan I with additional effects on libido. Not FDA-approved; used in research settings.
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Methylene Blue
Longevity
Methylene Blue is a synthetic phenothiazine dye and the first synthetic drug ever used in medicine. It acts as an alternative mitochondrial electron carrier and has FDA-approved medical uses (methemoglobinemia), with research interest in cognition and cellular energy.
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MK-677 (Ibutamoren)
Growth Hormone (GHRP)
MK-677 (Ibutamoren) is an oral growth hormone secretagogue that mimics ghrelin to stimulate GH and IGF-1 release. Unlike injectable peptides, it's taken orally and has a long duration of action. Known for increasing appetite, improving sleep, and supporting muscle/recovery.
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MOTS-C
Longevity
MOTS-C is a mitochondrial-derived peptide that regulates metabolic homeostasis and has exercise-mimetic effects. Studied for improving insulin sensitivity, fat metabolism, and physical performance. Considered a promising target for metabolic diseases and aging.
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NAD+
Longevity
NAD+ (Nicotinamide Adenine Dinucleotide) is a coenzyme essential for cellular energy production, DNA repair, and sirtuin activation. Levels decline significantly with age. Injectable NAD+ provides direct cellular replenishment, bypassing oral bioavailability issues. Research explores applications in anti-aging, neurodegeneration, metabolic health, and addiction recovery.
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Noopept
Cognitive
Noopept (omberacetam) is a racetam-class research nootropic with some human/Russian clinical data. Community-reported dosing clusters around 10-30 mg/day. Sold for research use only.
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NSI-189
Cognitive
NSI-189 is a small-molecule research compound studied for depression and neurogenesis; its Phase 2 depression trial missed its primary endpoint. Community-reported dosing is ~40-80 mg/day. Research use only.
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Oxytocin
Hormone
Oxytocin is a 9-amino acid neuropeptide known as the 'love hormone' or 'bonding hormone.' Produced in the hypothalamus and released by the pituitary gland, it plays crucial roles in social bonding, trust, empathy, sexual reproduction, childbirth, and breastfeeding. Research explores its potential for anxiety, autism spectrum disorders, and relationship enhancement.
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P-21
Cognitive
P-21 (P021) is a Cerebrolysin-derived peptidergic compound studied in preclinical rodent neurogenesis models; there are no human trials. Research use only.
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PDA (Pentadeca Arginate)
Healing
An arginate-salt analog of BPC-157 marketed for tissue repair. No PDA-specific human trials exist; evidence is extrapolated from BPC-157 research.
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Pinealon
Cognitive
A Khavinson short-peptide bioregulator (tripeptide Glu-Asp-Arg / EDR) studied in preclinical cell and rodent models for neuroprotection and cognition.
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Prostamax
Longevity
Prostamax is a prostate peptide bioregulator studied for prostate-tissue support.
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PT-141
Hormone
PT-141 (Bremelanotide) is a melanocortin receptor agonist FDA-approved for hypoactive sexual desire disorder (HSDD) in women. Unlike PDE5 inhibitors, it works centrally in the brain to increase sexual desire rather than just blood flow. Originally derived from Melanotan II, it activates MC3R and MC4R receptors involved in sexual arousal and behavior.
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PTD-DBM
Hair Growth
PTD-DBM is a cell-penetrating peptide that promotes hair growth by inhibiting CXXC5, a negative regulator of the Wnt/β-catenin signaling pathway. By blocking CXXC5-Dishevelled interaction, it activates Wnt signaling which is essential for hair follicle development and cycling. Research shows it can stimulate new hair growth and increase hair follicle size. Often used topically or via microneedling for androgenetic alopecia and hair thinning.
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Retatrutide
Weight Loss
Retatrutide is an investigational triple agonist targeting GIP, GLP-1, and glucagon receptors simultaneously. Phase 2 trials showed unprecedented 24% weight loss at the highest dose — the most ever recorded for any obesity medication. Currently in Phase 3 clinical trials, it represents the next generation of metabolic therapies.
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Selank
Cognitive
Selank is a synthetic neuropeptide derived from tuftsin with anxiolytic and nootropic properties. Developed in Russia for anxiety and cognitive enhancement. Studied for mood regulation, memory, and immune modulation without sedative effects.
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Semaglutide
Weight Loss
Semaglutide is a GLP-1 receptor agonist FDA-approved for type 2 diabetes and weight management. It reduces appetite, slows gastric emptying, and improves insulin sensitivity, producing 15-20% weight loss in clinical trials. Administered as a once-weekly injection due to its ~7 day half-life.
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Semax
Cognitive
Semax is a synthetic peptide derived from ACTH (4-10) with neuroprotective and cognitive-enhancing properties. Developed in Russia for stroke recovery and cognitive disorders. Studied for memory, focus, neuroplasticity, and BDNF stimulation.
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Sermorelin
Growth Hormone (GHRH)
Sermorelin is the native GHRH(1-29) fragment — the first 29 amino acids of natural growth hormone-releasing hormone. It stimulates the pituitary gland to produce GH in a physiological, pulsatile pattern. The longest-studied GHRH analog with an established clinical track record.
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SLU-PP-332
Small Molecule
A small-molecule ERR receptor agonist that acts like exercise inside your cells — driving mitochondrial biogenesis, fat oxidation, and endurance gains without any actual training.
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SNAP-8
Cosmetic / Skin
A topical cosmetic anti-wrinkle peptide — the elongated, eight-amino-acid form of Argireline (acetyl hexapeptide-8). Sold as a 10mg research vial; the evidence is limited cosmetic/topical data, with no systemic or injectable human trials.
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SS-31 (Elamipretide)
Longevity
SS-31 (Elamipretide) is a mitochondria-targeted peptide that concentrates in the inner mitochondrial membrane. Studied for improving mitochondrial function, reducing oxidative stress, and supporting cellular energy production. In clinical trials for mitochondrial diseases and heart failure.
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Survodutide
Weight Loss
Survodutide is a dual GLP-1/glucagon receptor agonist being investigated for obesity, type 2 diabetes, and metabolic dysfunction-associated steatohepatitis (MASH). By activating both GLP-1 and glucagon receptors, it promotes appetite suppression, fat oxidation, and improved hepatic lipid metabolism. In Phase III clinical trials showing significant weight loss and liver fat reduction.
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TB-500
Healing
TB-500 (Thymosin Beta-4 fragment) is a synthetic peptide that promotes tissue repair, cell migration, and angiogenesis. Researched for wound healing, flexibility, injury recovery, and reducing inflammation. Often discussed alongside BPC-157 for synergistic healing effects.
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Tesamorelin
Growth Hormone (GHRH)
Tesamorelin is the only FDA-approved GHRH analog — clinically shown to build lean muscle while reducing visceral belly fat by 15-18%. Uses the full 44 amino acid GHRH sequence with a trans-3-hexenoic acid modification for stability. Produces physiological GH pulses that drive both protein synthesis in skeletal muscle and lipolysis in abdominal fat.
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Tesofensine
Weight Loss
Tesofensine is a serotonin-noradrenaline-dopamine reuptake inhibitor (SNDRI) originally developed for Parkinson's and Alzheimer's disease. Phase 2 trials showed remarkable weight loss of up to 12.8% over 6 months — more than double most approved obesity drugs. Works by reducing appetite and increasing satiety through triple monoamine reuptake inhibition.
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Testagen
Longevity
Testagen is a testis-derived peptide bioregulator studied for reproductive-tissue support.
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Thymalin
Immune
Thymalin is a thymus-derived peptide bioregulator studied for immune modulation and age-related immune decline.
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Thymogen
Immune
Thymogen is a thymus-derived Glu-Trp dipeptide bioregulator studied for immune modulation.
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Thymosin Alpha-1
Immune
Thymosin Alpha-1 (Tα1) is a 28-amino acid immunomodulatory peptide naturally produced by the thymus gland. It enhances T-cell function, dendritic cell maturation, and cytokine balance. Approved in over 35 countries as Zadaxin for hepatitis B/C and as an immune adjuvant. Research explores applications in chronic infections, cancer immunotherapy, immune deficiency, and vaccine enhancement.
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Thymosin Beta-4
Healing
Thymosin Beta-4 (TB-4) is the full-length 43 amino acid peptide naturally found in human tissues, particularly the thymus gland. It plays a crucial role in tissue repair, wound healing, cell migration, angiogenesis, and immune regulation. More biologically complete than TB-500, it interacts with multiple pathways for superior regenerative effects. Often stacked with BPC-157 for comprehensive healing.
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Thymulin
Immune
Thymulin (also known as Facteur Thymique Sérique or FTS) is a 9-amino acid peptide naturally produced by thymic epithelial cells. It requires zinc for biological activity and plays essential roles in T-cell differentiation, immune regulation, and neuroendocrine function. Research explores applications in immune aging, autoimmune conditions, hair loss, and as an anti-aging intervention. Thymulin levels decline significantly with age.
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Tirzepatide
Weight Loss
Tirzepatide is the first dual GIP/GLP-1 receptor agonist, FDA-approved for type 2 diabetes and weight management. Its dual mechanism produces superior weight loss (20-25% in trials) compared to GLP-1-only medications. Administered once weekly with powerful effects on appetite, blood sugar, and body composition.
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Vilon
Immune
Vilon is a Lys-Glu (KE) dipeptide bioregulator studied for immune function and geroprotection.
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VIP
Immune
VIP (Vasoactive Intestinal Peptide) is a 28-amino-acid neuropeptide with broad immunomodulatory, neuroprotective, and vasodilatory effects. Central to the Shoemaker protocol for CIRS/mold illness treatment. Also researched for pulmonary hypertension, circadian rhythm regulation, and neuroinflammation.
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Vitamin B12
Weight Loss
Vitamin B12 (cobalamin) is an essential water-soluble nutrient central to energy metabolism, red blood cell formation, DNA synthesis, and nerve function. Research and injectable forms include cyanocobalamin, methylcobalamin, and hydroxocobalamin. Deficiency is common and backed by extensive human clinical data.
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