Peptide Library
A reference library of research peptides — including molecular data, CAS numbers, and supplier availability on PeppyCheck.
5-Amino-1MQ
5-Amino-1-methylquinolinium, 5-AMQ
5-Amino-1MQ is a small molecule nicotinamide N-methyltransferase (NNMT) inhibitor consisting of a methylated quinolinium structure. Unlike the peptide-based compounds in this library, it is a small molecule that acts by blocking NNMT activity, an enzyme involved in the regulation of NAD⁺ metabolism and methylation pathways. Research has focused on its role in adipocyte differentiation, lipid metabolism, and energy expenditure regulation. Studies have examined its effects on SAM and NAD⁺ availability in the context of metabolic and body composition research. It is supplied in powder form for research purposes.
AOD-9604
Anti-Obesity Drug 9604, Tyr-hGH Fragment 177-191
AOD-9604 is a synthetic peptide fragment derived from the C-terminal region of human growth hormone (hGH), consisting of amino acids 177-191 with a tyrosine residue added at the N-terminus. Research has focused on its role in lipid metabolism, specifically its ability to stimulate lipolysis and inhibit lipogenesis through mechanisms that appear independent of IGF-1 pathway activation. Studies have examined its metabolic effects in the context of adipose tissue regulation and energy homeostasis research. It is supplied in lyophilised form for research purposes.
BPC-157
Body Protection Compound-157, PL 14736, Bepecin
BPC-157 is a synthetic pentadecapeptide consisting of 15 amino acids, derived from a protective protein found in gastric juice. Research has focused on its role in tissue repair mechanisms, angiogenesis, and cytoprotective processes across various tissue types including tendon, muscle, and gastrointestinal tissue. It is among the most widely studied healing peptides in current research and is supplied in lyophilised form for research purposes.
Cagrilintide
AM833, Cagri
Cagrilintide is a long-acting synthetic analogue of the pancreatic hormone amylin, consisting of a modified 37 amino acid sequence designed for extended half-life through fatty acid conjugation. Research has focused on its role in appetite regulation, gastric emptying, and glucagon suppression pathways. It is increasingly studied in combination with semaglutide, a pairing referred to as CagriSema, representing a dual amylin and GLP-1 receptor agonist approach to metabolic research. It is supplied in lyophilised form for research purposes.
CJC-1295
DAC:GRF, CJC1295
CJC-1295 is a synthetic analogue of growth hormone-releasing hormone (GHRH) consisting of 30 amino acids, modified with a drug affinity complex (DAC) to extend its half-life through albumin binding. Research has focused on its role in sustained growth hormone and IGF-1 secretion, and it is among the most widely studied GHRH analogues in current research. It is frequently studied in combination with selective growth hormone secretagogues such as Ipamorelin. It is supplied in lyophilised form for research purposes.
Dihexa
N-hexanoic-Tyr-Ile-(6) aminohexanoic amide, PNB-0408
Dihexa is a synthetic heptapeptide analogue derived from angiotensin IV, designed to cross the blood-brain barrier and act as a potent hepatocyte growth factor (HGF) agonist at the MET receptor. Research has focused on its role in synaptogenesis, dendritic spine formation, and cognitive function in the context of neurodegenerative disease models. Studies have identified it as one of the most potent pro-cognitive compounds examined in preclinical research, with activity at concentrations significantly lower than other nootropic peptides. It is supplied in lyophilised form for research purposes.
DSIP
Delta Sleep-Inducing Peptide, Delta Sleep Peptide
DSIP is a naturally occurring nonapeptide consisting of 9 amino acids, first isolated from the cerebral venous blood of rabbits in a sleep-induced state. It is found endogenously in the hypothalamus, limbic system, and peripheral organs including the pancreas and adrenal glands. Research has focused on its role in sleep-wake cycle regulation, neuroendocrine modulation, and stress response pathways. Studies have also examined its antioxidant properties and its effects on pituitary hormone release, including growth hormone and LH secretion. It is supplied in lyophilised form for research purposes.
Epithalon
Epitalon, Epithalone, Tetrapeptide-2
Epithalon is a synthetic tetrapeptide consisting of four amino acids (Ala-Glu-Asp-Gly), derived from the naturally occurring polypeptide Epithalamin produced by the pineal gland. Research has focused on its role in telomerase activation, telomere elongation, and regulation of the neuroendocrine system. It is among the most widely studied peptides in longevity and ageing research, with studies examining its effects on cell cycle regulation and oxidative stress pathways. It is supplied in lyophilised form for research purposes.
Fragment 176-191
HGH Frag 176-191, HGH Fragment, Growth Hormone Fragment 176-191
Fragment 176-191 is a synthetic peptide consisting of the last 16 amino acids of the C-terminal region of human growth hormone (hGH), corresponding to positions 176 through 191 of the native sequence. It is closely related to AOD-9604 but lacks the additional N-terminal tyrosine residue. Research has focused on its role in lipid metabolism regulation, particularly lipolytic activity in adipose tissue and its effects on fat oxidation pathways. Studies have examined its metabolic properties in the context of energy homeostasis and body composition research. It is supplied in lyophilised form for research purposes.
GHK-Cu
Copper Peptide, GHK Copper, Glycyl-L-histidyl-L-lysine copper
GHK-Cu is a naturally occurring copper complex consisting of the tripeptide glycyl-L-histidyl-L-lysine bound to a copper ion. It is found endogenously in human plasma, saliva, and urine, with plasma concentrations declining significantly with age. Research has focused on its role in wound healing mechanisms, collagen and glycosaminoglycan synthesis, angiogenesis, and antioxidant activity. Studies have also examined its role in gene expression regulation, with research identifying effects on a broad range of genes associated with tissue remodelling and anti-inflammatory pathways. It is supplied in lyophilised form for research purposes.
Gonadorelin
GnRH, Gonadotropin-Releasing Hormone, LHRH, Factrel
Gonadorelin is a synthetic decapeptide identical in structure to endogenous gonadotropin-releasing hormone (GnRH), produced by the hypothalamus to regulate the hypothalamic-pituitary-gonadal axis. Consisting of 10 amino acids, research has focused on its role in stimulating the release of luteinising hormone (LH) and follicle-stimulating hormone (FSH) from the anterior pituitary. Studies have examined its pulsatile secretion dynamics and its role in reproductive axis regulation research. It is supplied in lyophilised form for research purposes.
Hexarelin
Examorelin, EP-23905, MF-6003
Hexarelin is a synthetic hexapeptide and potent growth hormone secretagogue that acts as a ghrelin receptor agonist. Consisting of 6 amino acids, research has focused on its role in growth hormone release from the pituitary gland, with studies noting it as one of the most potent synthetic growth hormone releasing peptides identified to date. Additional research has examined its cardioprotective properties through ghrelin receptor activation independent of growth hormone secretion. It is supplied in lyophilised form for research purposes.
Humanin
HN, Humanin G, HNG
Humanin is a 21 amino acid mitochondria-derived peptide encoded within the 16S ribosomal RNA gene of the mitochondrial genome, first identified through screening of a human brain cDNA library. Like MOTS-c, it is encoded by mitochondrial rather than nuclear DNA. Research has focused on its cytoprotective and neuroprotective properties, with studies examining its role in apoptosis inhibition, mitochondrial function, and cellular stress response pathways. It is frequently studied alongside MOTS-c in the context of mitochondrial peptide research and longevity biology. It is supplied in lyophilised form for research purposes.
Ipamorelin
NNC 26-0161
Ipamorelin is a synthetic pentapeptide and selective growth hormone secretagogue that acts as a ghrelin receptor agonist. Consisting of 5 amino acids, it is among the most selective growth hormone releasing peptides identified in research, with studies focused on its role in stimulating pituitary growth hormone release with minimal effect on cortisol or prolactin secretion. It is frequently studied alongside CJC-1295 and other GHRH analogues. It is supplied in lyophilised form for research purposes.
KPV
Lys-Pro-Val
KPV is a synthetic tripeptide consisting of three amino acids (Lysine-Proline-Valine), derived from the C-terminal sequence of alpha-melanocyte-stimulating hormone (α-MSH). Research has focused on its role in anti-inflammatory signalling pathways, particularly its ability to inhibit pro-inflammatory cytokine production and NF-κB pathway activation. Studies have examined its cytoprotective properties in gastrointestinal tissue, with particular interest in intestinal barrier function and gut inflammation research. It is supplied in lyophilised form for research purposes.
LL-37
CAP-18, Human Cathelicidin, hCAP-18
LL-37 is a 37 amino acid cationic antimicrobial peptide and the only known human cathelicidin, derived from the C-terminal domain of the precursor protein hCAP-18. It is produced by neutrophils, macrophages, mast cells, and epithelial cells as part of the innate immune response. Research has focused on its role in antimicrobial activity against gram-positive and gram-negative bacteria, immunomodulatory signalling, wound healing, and angiogenesis. Studies have also examined its role in modulating toll-like receptor signalling pathways and its interactions with epithelial and immune cells. It is supplied in lyophilised form for research purposes.
Melanotan II
MT-2, MTII
Melanotan II is a synthetic analogue of the naturally occurring peptide hormone alpha-melanocyte-stimulating hormone (α-MSH), consisting of a cyclic heptapeptide structure. Research has focused on its role as a non-selective melanocortin receptor agonist, with binding activity at MC1R, MC3R, MC4R, and MC5R subtypes. Studies have examined its role in melanogenesis, pigmentation pathways, and central nervous system melanocortin signalling. It is supplied in lyophilised form for research purposes.
MK-677
Ibutamoren, Ibutamoren Mesylate, L-163,191, Nutrobal
MK-677 is a potent, orally active, non-peptide ghrelin receptor agonist and growth hormone secretagogue. Unlike peptide-based secretagogues, it is a small molecule compound that mimics the action of ghrelin at the pituitary and hypothalamus. Research has focused on its role in sustained growth hormone and IGF-1 secretion, sleep quality, and nitrogen balance. It is among the most widely researched growth hormone secretagogues due to its oral bioavailability. It is supplied in powder form for research purposes.
MOTS-c
Mitochondrial Open Reading Frame of the 12S rRNA-c
MOTS-c is a 16 amino acid mitochondria-derived peptide encoded within the 12S ribosomal RNA gene of the mitochondrial genome. It is one of a small number of peptides known to be encoded by mitochondrial rather than nuclear DNA. Research has focused on its role in metabolic regulation, particularly its effects on AMPK pathway activation, glucose uptake, and insulin sensitivity. Studies have examined its role in mitochondrial biogenesis, cellular stress response, and age-related metabolic decline, positioning it as one of the most studied mitochondrial peptides in longevity research. It is supplied in lyophilised form for research purposes.
NA-Selank
N-Acetyl Selank, Acetyl Selank
NA-Selank is the N-acetylated form of Selank, a synthetic heptapeptide analogue of tuftsin. The addition of an acetyl group at the N-terminus is intended to enhance enzymatic stability and extend the active half-life relative to standard Selank. Research has focused on its role in GABA-A receptor modulation, BDNF expression regulation, and anxiolytic signalling pathways. It is frequently studied alongside NA-Semax in cognitive and nootropic research contexts. It is supplied in lyophilised form for research purposes.
NA-Semax
N-Acetyl Semax, Acetyl Semax
NA-Semax is the N-acetylated form of Semax, a synthetic heptapeptide analogue of ACTH 4-7. The addition of an acetyl group at the N-terminus is intended to enhance resistance to enzymatic degradation and extend the active half-life of the compound. Research has focused on its role in BDNF and NGF expression modulation, dopaminergic and serotonergic system activity, and neuroprotective signalling pathways. It is widely studied alongside standard Semax and NA-Selank in cognitive research contexts. It is supplied in lyophilised form for research purposes.
Oxytocin
OXT, Pitocin, Syntocinon
Oxytocin is a naturally occurring nonapeptide hormone produced in the hypothalamus and released by the posterior pituitary gland. Consisting of 9 amino acids with a disulfide bridge, it is one of the most extensively studied neuropeptides in research. Studies have examined its role in social bonding, stress response modulation, hypothalamic-pituitary axis regulation, and autonomic nervous system function. Research has also focused on its role in anti-inflammatory signalling and gastrointestinal motility pathways. It is supplied in lyophilised form for research purposes.
Pentadeca Arginate
PDA, BPC-157 Arginate
Pentadeca Arginate is a synthetic pentadecapeptide and stable arginine salt derivative of BPC-157, consisting of 15 amino acids with an arginine modification designed to enhance stability and bioavailability. Research has focused on its role in tissue repair mechanisms, angiogenesis, and cytoprotective processes, sharing overlapping mechanisms of action with BPC-157. It has generated significant community research interest as an alternative to BPC-157 with potentially improved stability characteristics. It is supplied in lyophilised form for research purposes.
Pinealon
EDR Peptide, Glu-Asp-Arg
Pinealon is a synthetic tripeptide consisting of three amino acids (Glutamic acid-Aspartic acid-Arginine), derived from the pineal gland peptide complex. It is closely related to Epithalon in its origin and research context, both being short peptides associated with pineal gland biology and longevity research. Studies have focused on its role in neuroprotective signalling, regulation of gene expression in neuronal tissue, and antioxidant activity. It is frequently studied alongside Epithalon in the context of peptide bioregulator and longevity research. It is supplied in lyophilised form for research purposes.
PT-141
Bremelanotide, Vyleesi
PT-141 is a synthetic cyclic heptapeptide and melanocortin receptor agonist, derived from Melanotan II through removal of the C-terminal amide group. Unlike its precursor, PT-141 does not produce significant skin pigmentation effects. Research has focused on its role in melanocortin receptor activation, particularly MC3R and MC4R pathways, and its effects on central nervous system signalling. It is supplied in lyophilised form for research purposes.
Retatrutide
LY-3437943, LY3437943, Retaglutide
Retatrutide is a triple receptor agonist targeting glucagon-like peptide-1 (GLP-1), glucose-dependent insulinotropic polypeptide (GIP), and glucagon receptors. Consisting of 36 amino acids, it represents the next generation of incretin-based research compounds following dual agonists such as tirzepatide. Research has focused on its role in metabolic regulation, energy homeostasis, and glucose signalling pathways. It is supplied in lyophilised form for research purposes.
Selank
TP-7, Selanк
Selank is a synthetic heptapeptide analogue of the endogenous immunomodulatory peptide tuftsin, developed by the Institute of Molecular Genetics of the Russian Academy of Sciences. Consisting of 7 amino acids, research has focused on its role in modulating GABA-A receptor activity, regulating brain-derived neurotrophic factor (BDNF) expression, and influencing serotonin metabolism. Studies have examined its anxiolytic and nootropic properties in the context of central nervous system signalling research. It is supplied in lyophilised form for research purposes.
Semaglutide
Ozempic, Wegovy, Rybelsus, GLP-1 agonist
Semaglutide is a glucagon-like peptide-1 (GLP-1) receptor agonist consisting of 31 amino acids. It shares approximately 94% structural homology with endogenous human GLP-1. Research has focused on its role in glucose metabolism regulation, appetite signalling pathways, and metabolic function. It is supplied in lyophilised form for research purposes.
Semax
ACTH 4-7 Pro8Gly9Pro10, Meksidol
Semax is a synthetic heptapeptide analogue derived from the N-terminal fragment of adrenocorticotropic hormone (ACTH 4-7), developed by the Institute of Molecular Genetics of the Russian Academy of Sciences. Research has focused on its role in modulating brain-derived neurotrophic factor (BDNF) and nerve growth factor (NGF) expression, dopaminergic and serotonergic system activity, and neuroprotective signalling pathways. It is frequently studied alongside Selank in cognitive research contexts. It is supplied in lyophilised form for research purposes.
Sermorelin
GHRH 1-29, GRF 1-29, Geref
Sermorelin is a synthetic analogue of endogenous growth hormone-releasing hormone (GHRH) consisting of the first 29 amino acids of the native 44 amino acid sequence, representing the shortest fully active fragment. Research has focused on its role in stimulating pituitary growth hormone secretion and its pharmacokinetic profile relative to full-length GHRH. It is one of the most extensively studied GHRH analogues and is supplied in lyophilised form for research purposes.
SS-31
Elamipretide, MTP-131, Bendavia
SS-31 is a synthetic tetrapeptide and mitochondria-targeted antioxidant belonging to the Szeto-Schiller peptide family. Consisting of 4 amino acids with alternating aromatic and basic residues, it selectively concentrates in the inner mitochondrial membrane where it interacts with cardiolipin. Research has focused on its role in mitochondrial membrane stabilisation, reduction of reactive oxygen species, and preservation of ATP synthesis under conditions of oxidative stress. It is frequently studied alongside other mitochondrial peptides such as MOTS-c and Humanin in longevity and bioenergetics research. It is supplied in lyophilised form for research purposes.
TB-500
Thymosin Beta-4, Tβ4, TB4
TB-500 is a synthetic peptide fragment derived from Thymosin Beta-4, a naturally occurring 43 amino acid protein present in virtually all human and animal cells. Research has focused on its role in actin regulation, cell migration, angiogenesis, and tissue repair processes. It is frequently studied alongside BPC-157 due to complementary mechanisms of action in tissue recovery research. It is supplied in lyophilised form for research purposes.
Tesamorelin
TH9507, Egrifta
Tesamorelin is a synthetic analogue of endogenous growth hormone-releasing hormone (GHRH) consisting of the full 44 amino acid sequence of native GHRH with a trans-3-hexenoic acid group added at the N-terminus to enhance stability. Research has focused on its role in stimulating pituitary growth hormone secretion and its effects on IGF-1 levels and lipid metabolism. It is among the most studied full-length GHRH analogues and is supplied in lyophilised form for research purposes.
Thymosin Alpha-1
Tα1, Thymalfasin, Zadaxin
Thymosin Alpha-1 is a synthetic 28 amino acid peptide derived from the naturally occurring thymic peptide prothymosin alpha, originally isolated from thymic tissue. It is produced endogenously by thymic epithelial cells and plays a role in T-cell development and maturation. Research has focused on its role in immunomodulatory signalling, particularly its effects on dendritic cell function, T-cell differentiation, and cytokine production pathways. Studies have also examined its role in toll-like receptor signalling and innate immune response modulation. It is supplied in lyophilised form for research purposes.
Thymosin Beta-4 Fragment
TB-4 Frag, Tβ4 Fragment, TB500 Fragment
Thymosin Beta-4 Fragment is a synthetic peptide corresponding to the active actin-binding domain of the full Thymosin Beta-4 sequence, specifically the LKKTETQ sequence considered responsible for the primary biological activity of TB-500. Research has focused on its role in actin sequestration, cell migration, and tissue repair processes. It is increasingly supplied as a more targeted alternative to full-length TB-500 and is supplied in lyophilised form for research purposes.
Tirzepatide
LY3298176, Mounjaro, Zepbound, Tirz
Tirzepatide is a dual glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like peptide-1 (GLP-1) receptor agonist consisting of 39 amino acids. It is structurally based on the native GIP sequence with modifications to enable GLP-1 receptor co-activation. Research has focused on its role in glucose homeostasis, metabolic regulation, and appetite signalling pathways. It is supplied in lyophilised form for research purposes.