Peptide Library

5-Amino-1MQ is a small-molecule inhibitor of NNMT (nicotinamide N-methyltransferase) that boosts intracellular NAD+ levels and shifts cells toward fat-burning. It shows promise for obesity, metabolic syndrome, and body recomposition without stimulant effects.

ACE-031 is a recombinant fusion protein that acts as a myostatin/activin type IIB receptor decoy, blocking inhibitory signals on muscle growth. It demonstrated substantial lean mass gains in clinical trials for Duchenne muscular dystrophy before development was halted due to vascular side effects at high doses.

Adamax is a proprietary blend of Semax and Selank, combining the BDNF-upregulating, dopaminergic properties of Semax with the anxiolytic, serotonergic properties of Selank. The result is a synergistic nootropic that enhances focus, memory, and mood while reducing anxiety.

AHK-Cu is a copper-chelating tripeptide (Ala-His-Lys) that stimulates hair follicle growth and skin remodeling. It activates stem cells in the hair follicle bulge region, making it one of the most studied peptides for hair loss and scalp health.

AICAR is a cell-permeable AMP analog that activates AMP-activated protein kinase (AMPK) — the cell's master energy sensor. Often called an "exercise mimetic," it triggers many of the same cellular adaptations as aerobic training: increased fat oxidation, improved glucose uptake, mitochondrial biogenesis, and cardioprotection, without requiring physical activity.

AOD9604 is a modified fragment of human growth hormone (HGH) consisting of amino acids 177-191 with an added tyrosine at the N-terminus. It was designed to retain the fat-metabolizing properties of GH without stimulating IGF-1 production or causing glucose intolerance.

ARA-290 is a non-erythropoietic peptide derived from the helix B surface of erythropoietin (EPO). It selectively activates the innate repair receptor (IRR) to provide neuroprotection and tissue repair without the blood-thickening effects of EPO itself.

BAM-15 is a novel mitochondrial protonophore (uncoupler) that dissipates the mitochondrial proton gradient as heat rather than ATP, dramatically increasing the metabolic rate. Unlike older uncouplers such as DNP, BAM-15 does not cause dangerous hyperthermia in animal models, making it a promising candidate for safe metabolic weight loss and insulin sensitisation.

BPC-157 is a pentadecapeptide (15 amino acids) derived from a protective gastric protein in the human stomach. It is one of the most studied healing peptides, with extensive evidence for accelerating repair of tendons, ligaments, muscle, bone, and gut tissue in animal models.

The Wolverine Stack is the most popular healing peptide combination, blending BPC-157 and TB-500 (Thymosin Beta-4) in a single vial. BPC-157 drives early angiogenesis and tissue repair while TB-500 promotes actin polymerization and cell migration — the two mechanisms together produce dramatically faster healing than either alone.

An enhanced version of the Wolverine Stack that adds Cartalax — a cartilage-specific bioregulator — for targeted joint and connective tissue repair. Ideal for individuals with arthritis, joint degeneration, or sports injuries involving cartilage damage.

Cardiogen is a short tetrapeptide bioregulator developed by the St. Petersburg Institute of Bioregulation and Gerontology (Russia). It targets cardiac muscle tissue to improve myocardial function, particularly in conditions of ischemia, aging-related cardiac decline, and heart failure.

Cartalax is a tripeptide bioregulator (Ala-Glu-Asp or similar) that specifically targets cartilage and connective tissue gene expression. It was developed alongside other Russian bioregulator peptides to address cartilage degeneration and joint aging.

The most popular growth hormone optimization stack, combining CJC-1295 (No DAC) — a GHRH analog that stimulates pituitary GH release — with Ipamorelin, a selective ghrelin mimetic. Together they produce a strong, clean GH pulse with minimal side effects compared to exogenous HGH.

CJC-1295 without Drug Affinity Complex (DAC) is a modified form of GHRH (1-29) with four amino acid substitutions that extend its half-life from 7 minutes to ~30 minutes. It stimulates natural GH pulses from the pituitary without causing continuous (non-pulsatile) GH elevation.

CJC-1295 with Drug Affinity Complex (DAC) is a long-acting GHRH analog that covalently binds albumin in the bloodstream, extending its half-life to ~8 days. Unlike CJC-1295 No DAC, it provides continuous (non-pulsatile) GH elevation rather than discrete pulses.

Cortagen is a tetrapeptide bioregulator derived from brain cortex tissue, developed at the St. Petersburg Institute of Bioregulation and Gerontology. It is designed to maintain and restore neuronal function in the cerebral cortex, with applications in cognitive decline, aging, and neurological conditions.

Dihexa is a potent nootropic peptide derived from angiotensin IV. It is one of the most powerful known cognitive enhancers in animal models, reported to be approximately 7 orders of magnitude more potent than BDNF at promoting synapse formation. It acts through the HGF/Met pathway to promote neuroplasticity.

DSIP (Delta Sleep-Inducing Peptide) is a nonapeptide that was first isolated from the thalamus of rabbits in 1977. It promotes delta-wave (deep/slow-wave) sleep, reduces stress hormones, and shows adaptogenic properties. It is used by the peptide community for sleep quality, stress, and pain management.

Epithalon is a synthetic tetrapeptide (Ala-Glu-Asp-Gly) that mimics the action of epithalamin, a natural peptide extract of the pineal gland. It is one of the most extensively studied anti-aging peptides, with evidence for telomere lengthening, improved melatonin secretion, circadian rhythm restoration, and cancer suppression in animal models.

Follistatin 344 is a naturally occurring glycoprotein that acts as a potent inhibitor of myostatin and activin — key negative regulators of muscle growth. The "344" refers to the 344-amino acid isoform that circulates in the bloodstream. It produces dramatic lean mass increases and fat loss.

FOX04-DRI is a D-retro-inverso peptide that disrupts the interaction between FOXO4 and p53 in senescent cells, allowing p53 to trigger apoptosis. It is a highly targeted senolytic — selectively eliminating senescent ("zombie") cells that accumulate with aging and drive inflammation and tissue dysfunction.

GH Fragment 176-191 is the C-terminal peptide fragment of human growth hormone (residues 176–191). It specifically mimics the fat-mobilizing activity of GH without stimulating IGF-1 production, offering targeted lipolysis without the growth or glucose effects of full HGH.

GHK-Cu is a naturally occurring copper-chelating tripeptide (Gly-His-Lys) found in human plasma, saliva, and urine. It is one of the most thoroughly studied peptides for skin rejuvenation, wound healing, and anti-aging, with over 50 years of published research. Plasma levels decline significantly with age.

GHRP-2 is a synthetic hexapeptide GH secretagogue that binds to ghrelin receptors (GHS-R1a) in the pituitary to stimulate robust GH release. It is more potent than GHRP-6 with less hunger side effect but produces a modest increase in cortisol and prolactin at higher doses.

The Glow Blend is a triple-peptide injectable blend combining GHK-Cu (50 mg), BPC-157 (10 mg), and TB-500 (10 mg) in a standard 70 mg vial. GHK-Cu drives collagen remodeling and skin rejuvenation, BPC-157 accelerates tissue repair and angiogenesis, and TB-500 promotes cellular migration and recovery. Together they form a comprehensive skin health and healing protocol in a single vial.

Tirzepatide is a dual GIP/GLP-1 receptor agonist approved by the FDA for Type 2 diabetes (Mounjaro) and obesity (Zepbound). It produces among the greatest weight loss seen in a pharmacological agent, with phase 3 trials showing 20–22% body weight reduction over 72 weeks.

Retatrutide is a triple incretin receptor agonist targeting GLP-1, GIP, and glucagon receptors simultaneously. In Phase 2 trials, it produced the highest weight loss ever observed in a clinical trial for an obesity medication — averaging 24% body weight reduction at 48 weeks.

Gonadorelin is a synthetic form of GnRH (gonadotropin-releasing hormone) that stimulates the pituitary to release LH and FSH, which in turn stimulate the testes to produce testosterone and sperm. It is commonly used during or after anabolic steroid cycles to prevent or reverse testicular atrophy and maintain natural testosterone production.

IGF-LR3 is a long-acting analog of IGF-1 (insulin-like growth factor-1) with an 83-amino acid extension at the N-terminus (Arg3 substitution) that prevents binding to IGF binding proteins, giving it ~3x the potency and a much longer half-life than native IGF-1. It drives muscle protein synthesis, satellite cell activation, and fat oxidation.

Ipamorelin is a highly selective, pentapeptide GH secretagogue that mimics ghrelin to stimulate GH release from the pituitary. It is considered the "cleanest" GH-releasing peptide because it selectively triggers GH without significantly elevating cortisol, prolactin, or ACTH — making it the preferred entry point for GH peptide protocols.

Klotho Derived Peptide 1 (KL1) is a fragment of the α-Klotho protein, an aging-suppressor protein encoded by the KL gene. Blood levels of α-Klotho decline with age and are inversely correlated with cardiovascular disease, cognitive decline, and mortality. KL1 has shown cognitive improvements in aging mice at very low doses.

The KLOW Blend is a four-peptide injectable blend: GHK-Cu (50 mg), BPC-157 (10 mg), TB-500 (10 mg), and KPV (10 mg) in a standard 80 mg vial. It builds on the GLOW Blend by adding KPV, a potent anti-inflammatory tripeptide derived from α-MSH. The result is comprehensive healing, skin regeneration, and systemic anti-inflammatory support in one vial.

KPV is a C-terminal tripeptide (Lys-Pro-Val) derived from alpha-melanocyte-stimulating hormone (α-MSH). It has potent anti-inflammatory properties, particularly in the gut, making it highly promising for IBD (inflammatory bowel disease), Crohn's disease, and colitis. It acts directly on intestinal cells and immune cells.

L-Glutathione (GSH) is the master antioxidant of the human body — a tripeptide (Glu-Cys-Gly) that is the primary intracellular antioxidant and detoxification molecule. Supplemental glutathione has been studied for skin brightening, immune support, liver protection, and neurodegenerative disease. Injectable forms bypass the poor oral bioavailability.

LL-37 is the only human cathelicidin antimicrobial peptide, derived from the hCAP-18 protein. It is a first-line defense peptide in innate immunity, found in neutrophils, macrophages, and epithelial cells. Beyond direct antimicrobial activity, it modulates inflammation, promotes wound healing, and has emerging anticancer properties.

Mazdutide is a once-weekly dual GLP-1/glucagon receptor agonist developed by Innovent Biologics. Phase 2 and 3 trials have shown significant weight loss and glycemic improvement, with approval progressing in China and international trials underway.

MI-31 is a short research peptide studied for its effects on matrix metalloproteinase (MMP) inhibition and tissue remodeling. It is being investigated for applications in aging skin, fibrosis prevention, and connective tissue maintenance.

MOTS-C is a 16-amino acid peptide encoded within the mitochondrial genome (12S rRNA gene). It functions as a "mitokine" — a hormone-like signaling molecule produced by mitochondria that regulates systemic metabolism. Blood levels decline with age, and it is strongly implicated in age-related metabolic decline.

Melanotan 1 (MT-1 / Afamelanotide) is a synthetic analog of α-MSH (alpha-melanocyte-stimulating hormone) that stimulates melanin production in the skin. Unlike MT-2, it has minimal central nervous system activity, making it safer with fewer sexual side effects. It is FDA-approved (as Scenesse) for erythropoietic protoporphyria (EPP).

Melanotan 2 (MT-2) is a synthetic cyclic analog of α-MSH that binds all melanocortin receptors (MC1R–MC4R), producing tanning, appetite suppression, and powerful sexual arousal effects. The sexual and appetite effects arise from its central activity at MC3R and MC4R in the hypothalamus.

N-Acetyl Selank is an acetylated, more lipophilic form of Selank that penetrates the blood-brain barrier more effectively than the parent peptide. It provides enhanced anxiolytic and nootropic effects with potentially longer duration of action.

NAD+ (Nicotinamide Adenine Dinucleotide) is a critical coenzyme found in all living cells, essential for cellular energy production, DNA repair, and sirtuin (longevity gene) activation. Levels decline with age by up to 50%, and this decline is strongly linked to metabolic disease, neurodegeneration, and accelerated aging. IV or SubQ NAD+ provides rapid cell-level replenishment.

Oxytocin is a nonapeptide produced in the hypothalamus and released by the posterior pituitary. Known as the "love hormone" or "bonding hormone," it plays central roles in social bonding, trust, sexual activity, childbirth, lactation, and emotional regulation. Intranasal and injectable forms are used for mood, social, sexual, and anti-aging applications.

Pancragen is a tetrapeptide bioregulator from the St. Petersburg Institute series, designed to target pancreatic tissue function. It aims to support insulin secretion capacity, pancreatic cell longevity, and metabolic regulation, particularly in aging-related metabolic decline.

PE 22-28 is a synthetic 7-amino acid peptide fragment derived from the TREK-1 potassium channel blocker SPADIN, itself derived from the propeptide of neurotensin receptor 3. It acts as a rapid-onset antidepressant and cognitive enhancer in animal models, without the side effects of conventional antidepressants.

PEG MGF is a pegylated (polyethylene glycol-modified) form of Mechano Growth Factor (MGF), an IGF-1 splice variant produced by muscles in response to mechanical stretch and damage. Pegylation extends its half-life from minutes to days, allowing systemic delivery and sustained muscle satellite cell activation.

PNC-27 is a synthetic peptide incorporating the MDM-2-binding domain of p53 fused to a membrane-targeting sequence. In vitro and animal studies suggest it selectively kills cancer cells by inducing membrane lysis in cells that overexpress HDM-2 (the human version of MDM-2), while sparing normal cells. Research compound only.

PT-141 (Bremelanotide) is a synthetic melanocortin receptor agonist derived from MT-2 by removing the cyclic lactam bridge. It is FDA-approved (as Vyleesi) for hypoactive sexual desire disorder (HSDD) in premenopausal women, and is widely used off-label for sexual dysfunction in both sexes. Unlike PDE5 inhibitors, it acts centrally on the brain to create desire, not just physical arousal.

Selank is a synthetic heptapeptide analog of the immunomodulatory peptide tuftsin developed by the Institute of Molecular Genetics in Moscow. It is classified as an anxiolytic nootropic — reducing anxiety without sedation or addiction risk — and has been approved for use in Russia and Ukraine for anxiety and asthenia.

Semax is a synthetic ACTH analog (heptapeptide) developed by the Institute of Molecular Genetics (Russia). It is approved in Russia and Ukraine for stroke treatment, cognitive disorders, and as a nootropic. It powerfully upregulates BDNF and NGF, providing neuroprotection and cognitive enhancement.

A combination of Selank and Semax providing synergistic anxiolytic + nootropic coverage. Semax provides BDNF upregulation and cognitive stimulation while Selank provides anxiety relief and working memory support. Similar in concept to the branded Adamax blend.

Sermorelin is a synthetic analog of the first 29 amino acids of endogenous GHRH (growth hormone-releasing hormone). It is the oldest GHRH analog in clinical use and was previously FDA-approved for pediatric GH deficiency. It stimulates the pituitary gland to produce GH naturally, preserving pulsatile release and pituitary responsiveness.

SLU-PP-332 is a synthetic agonist of estrogen-related receptors (ERRα, ERRβ, ERRγ) that acts as an "exercise mimetic" — activating the same transcriptional programs in skeletal muscle and heart that endurance exercise produces. Animal studies show dramatic improvements in endurance, fat oxidation, and heart failure outcomes.

Snap-8 (Acetyl Octapeptide-3) is a topical cosmetic peptide that reduces the appearance of expression lines (wrinkles caused by facial muscle contractions). It is often described as a topical alternative to Botox, working through a similar but milder mechanism by reducing the signaling at the neuromuscular junction.

Survodutide is a once-weekly dual GLP-1/glucagon receptor co-agonist developed by Boehringer Ingelheim and Zealand Pharma. Phase 2 data shows significant weight loss of ~19% and additional benefit in NASH/MASH liver disease. Phase 3 trials ongoing.

TB-500 is a synthetic version of Thymosin Beta-4 (Tβ4), the most abundant peptide regulator of actin polymerization in virtually all mammalian cells. It is one of the most potent healing peptides, promoting cell migration, angiogenesis, anti-inflammatory effects, and regeneration of heart, skin, cornea, and musculoskeletal tissue.

A powerful triple-blend combining Tesamorelin (visceral fat-targeting GHRH analog), CJC-1295 No DAC (general GH pulse amplifier), and Ipamorelin (clean GHRP) for comprehensive GH optimization with targeted visceral fat reduction.

A dual GH peptide blend pairing Tesamorelin (visceral fat-targeting GHRH analog) with Ipamorelin (selective GHRP) for clean, targeted GH stimulation with emphasis on visceral fat reduction.

Tesamorelin is a synthetic analog of GHRH (full 44-amino acid sequence stabilized with trans-3-hexenoic acid modification) that is FDA-approved for HIV-associated lipodystrophy — specifically visceral fat accumulation. It reduces visceral adipose tissue with a favorable effect on metabolic markers.

Tesofensine is a triple monoamine reuptake inhibitor (norepinephrine, dopamine, serotonin) originally developed for Alzheimer's and Parkinson's disease. Phase 2 obesity trials showed remarkable weight loss of 10–14% over 24 weeks — surpassing any approved agent at the time. It is not a peptide per se but is commonly included in peptide clinic protocols.

Thymalin is a polypeptide extract of the bovine thymus gland, containing a mixture of thymic peptides including thymopoietin and thymosin fractions. It has been used in Eastern European medicine for immunosenescence, chronic infections, autoimmune modulation, and longevity for decades.

A synergistic blend of Thymosin Alpha 1 (the primary thymic immune modulator) and Thymulin (a zinc-dependent thymic nonapeptide). Together they address both the adaptive immune response (TA1) and the maturation of T-cells from the thymus (Thymulin), providing comprehensive thymic immune support.

Thymosin Alpha 1 (Tα1) is the most studied immunomodulatory peptide derived from the thymus. It is approved in numerous countries (as Zadaxin) for hepatitis B, hepatitis C, AIDS, and various cancers as an immune modulator. It enhances both innate and adaptive immune responses and is extensively used for chronic infections, immune dysfunction, and longevity.

Vesugen is a vascular-targeted tetrapeptide bioregulator from the St. Petersburg Institute series. It is designed to support the integrity and function of blood vessel walls, targeting endothelial cells and smooth muscle cells to counteract age-related vascular decline.

Vilon is a synthetic dipeptide (Lys-Glu) bioregulator from the thymus series, the simplest of the Russian thymic bioregulator peptides. Despite its tiny size, it has demonstrated significant immunomodulatory, anti-aging, and anti-tumor effects in animal and preliminary human studies.

VIP (Vasoactive Intestinal Peptide) is a 28-amino acid neuropeptide and hormone found throughout the nervous system, gut, and immune system. It is a potent vasodilator, anti-inflammatory agent, and neuroprotectant with applications in MCAS (mast cell activation), chronic inflammatory illness, pulmonary hypertension, and gut health.

Cagrilintide is a long-acting amylin analog (2× weekly) developed by Novo Nordisk. Amylin is a co-secreted hormone with insulin that reduces food intake, slows gastric emptying, and lowers glucagon. Combined with semaglutide (as CagriSema), it produced 15.6% weight loss in Phase 2 trials and is being studied in Phase 3 (REDEFINE program).

Enclomiphene is the trans-isomer of clomiphene citrate (Clomid) — the pure estrogen-receptor-blocking isomer without the estrogenic activity of the zuclomiphene isomer. It blocks hypothalamic estrogen receptors to remove negative feedback on GnRH, increasing LH and FSH release, and thus stimulating natural testosterone production.

Glutathione is the body's primary intracellular antioxidant tripeptide. Identical to L-Glutathione; the name is sometimes used interchangeably. Injectable forms provide high bioavailability for detoxification, immune support, skin lightening, and athletic recovery. See L-Glutathione entry for full detail.

GHRP-6 is one of the original synthetic growth hormone secretagogues, a hexapeptide that binds ghrelin receptors (GHS-R1a) to stimulate GH release. It is the most hunger-inducing of the GHRPs due to its more potent ghrelin mimicry, which can be used strategically for individuals who need to increase appetite (e.g., during a bulk).

HCG (Human Chorionic Gonadotropin) is a glycoprotein hormone produced during pregnancy. In men, it mimics LH (luteinizing hormone) and directly stimulates Leydig cells in the testes to produce testosterone, maintaining testicular function, size, and fertility during TRT or steroid cycles.

MGF (Mechano Growth Factor) is the Ec splice variant of IGF-1, produced locally in muscles in response to mechanical damage (exercise). Unlike PEG-MGF, native MGF has a very short half-life (minutes) and is typically injected directly into the worked muscle (local injection) immediately post-workout for site-specific satellite cell activation.

MK-677 (Ibutamoren) is an orally active, non-peptide growth hormone secretagogue that mimics ghrelin by binding GHS-R1a. It produces sustained, 24-hour elevation of GH and IGF-1 with once-daily oral dosing. Despite being a small molecule (not a peptide), it is extensively included in peptide clinic protocols due to its GH-stimulating mechanism.

Pinealon is a synthetic tripeptide (Glu-Asp-Arg) bioregulator targeting pineal gland tissue. The pineal gland produces melatonin and is the master circadian rhythm regulator. Pinealon aims to support pineal function, restore melatonin production, and protect neurons from hypoxic/ischemic damage.

RAD-140 (Testolone) is a selective androgen receptor modulator (SARM) — a non-peptide, non-steroidal compound that selectively binds androgen receptors in muscle and bone with high affinity while showing less activity in reproductive tissues (prostate, seminal vesicles). It produces anabolic effects comparable to testosterone with fewer androgenic side effects. Note: technically not a peptide.

SS-31 (Elamipretide) is a cell-permeable, mitochondria-targeted tetrapeptide that selectively accumulates in the inner mitochondrial membrane. It interacts with cardiolipin — a unique phospholipid essential for mitochondrial electron transport — protecting it from oxidative damage and restoring mitochondrial energy efficiency. It has shown remarkable results in heart failure, aging, and metabolic disease research.

Testagen is a tetrapeptide bioregulator (Lys-Glu-Asp-Gly / KEDG) developed by the Khavinson Institute (St. Petersburg Institute of Bioregulation and Gerontology). It is a tissue-specific peptide derived from testicular extract, designed to normalize gene expression in Leydig and Sertoli cells. It supports endogenous testosterone production and spermatogenesis, and is used for age-related androgen decline, mild hypogonadism, and post-cycle hormonal normalization.

Kisspeptin is a naturally occurring neuropeptide encoded by the KISS1 gene that acts as the master regulator of the hypothalamic-pituitary-gonadal (HPG) axis. By binding to GPR54 receptors in the hypothalamus it triggers a powerful pulse of GnRH, which in turn drives LH and FSH release, stimulating endogenous testosterone and estradiol production. It is used clinically to restore suppressed HPG axis function and is being studied extensively for male and female hypogonadism, IVF protocols, and as an alternative to exogenous LH in fertility treatment.