Peptide Encyclopedia
30 compounds · 20 with research studies
910463-68-2Semaglutide
GLP-1 Receptor Agonist
Also: Ozempic, Wegovy
A long-acting GLP-1 analog distinguished by its C18 fatty diacid chain, enabling albumin binding and a half-life of ~7 days. One of the most clinically studied peptides in modern metabolic research.
2023788-19-2Tirzepatide
GIP / GLP-1 Dual Agonist
Also: Mounjaro, Zepbound
A 39-amino acid synthetic peptide that simultaneously activates GIP and GLP-1 receptors. Demonstrated greater weight loss than any approved single-agonist in clinical trials.
2381089-83-2Retatrutide
GLP-1 / GIP / Glucagon Triple Agonist
Also: LY3437943
A novel triple receptor agonist targeting GLP-1, GIP, and glucagon receptors simultaneously — the first of its kind in human Phase 2 trials. Early data suggests it may surpass dual agonists.
137525-51-0BPC-157
Body Protection Compound 157
Also: PL-10, PLD-116
A 15-amino acid cytoprotective peptide derived from human gastric juice. Widely researched for wound healing, tendon repair, and GI protection across hundreds of animal studies.
77591-33-4TB-500
Thymosin Beta-4 Synthetic Fragment
Also: Tβ4, Thymosin β4 fragment
A synthetic fragment of Thymosin Beta-4, a ubiquitous actin-sequestering protein. Research focuses on promoting tissue repair, reducing inflammation, and supporting angiogenesis in cardiac and skeletal muscle models.
863288-34-0CJC-1295
GHRH Analog (No DAC)
Also: Modified GRF 1-29, Mod GRF(1-29)
A tetrasubstituted GHRH analog with four amino acid substitutions that increase receptor affinity and proteolytic resistance. Most commonly studied in combination with Ipamorelin for synergistic GH pulse amplification.
170851-70-4Ipamorelin
Selective GH Secretagogue
Also: NNC 26-0161
A pentapeptide ghrelin mimetic renowned for its exceptional receptor selectivity. Unlike other GHSRs, Ipamorelin does not significantly raise cortisol, ACTH, or prolactin — making it a clean research tool for isolated GH axis studies.
1448498-00-7MOTS-c
Mitochondrial Open Reading Frame of the 12S rRNA-c
Also: Mitochondrial-Derived Peptide, MDP
A 16-amino acid peptide encoded within the mitochondrial genome — a newly discovered class of signaling molecule. Regulates metabolic homeostasis via AMPK and FOXO1 pathways.
89030-95-5GHK-Cu
Copper Peptide Complex (Glycyl-L-Histidyl-L-Lysine:Cu²⁺)
Also: Copper tripeptide-1, GHK
A naturally occurring tripeptide-copper complex found in human plasma, saliva, and urine. Plasma levels decline sharply with age. Extensively studied for collagen induction, skin remodeling, and gene expression regulation.
189691-06-3PT-141
Bremelanotide — Melanocortin Receptor Agonist
Also: Bremelanotide, Vyleesi
A cyclic heptapeptide melanocortin receptor agonist and active metabolite of Melanotan II. Unlike peripheral vasodilators, PT-141 acts centrally via the CNS to modulate arousal and food intake pathways.
307297-39-8Epitalon
Epithalamin — Tetrapeptide Telomerase Activator
Also: Epithalamine, Ala-Glu-Asp-Gly
A synthetic tetrapeptide derived from the pineal gland peptide Epithalamin. Studied extensively by Vladimir Khavinson for telomerase activation, circadian regulation, and life extension in animal models.
218949-48-5Tesamorelin
GHRH Analog — Visceral Fat Reduction
Also: Egrifta, TH9507
A 44-amino acid GHRH analog with a trans-3-hexenoic acid N-terminal modification. FDA-approved for HIV-associated lipodystrophy. The most clinically validated GHRH analog for visceral adipose tissue reduction.
129954-34-3Selank
Anxiolytic Nootropic Heptapeptide
Also: TP-7, Selanc
A synthetic analog of the endogenous tetrapeptide Tuftsin. Developed by the Russian Institute of Molecular Genetics. Studied for anxiolytic, nootropic, and immunomodulatory effects without sedation or dependence.
80714-61-0Semax
ACTH(4-7) Pro-Gly-Pro Analog
Also: ACTH 4-7 PGP, Семакс
A synthetic analog of a fragment of ACTH that lacks hormonal activity but retains potent neuroprotective and cognitive-enhancing properties. Widely used in Russian clinical settings for stroke, memory, and attention disorders.
140703-51-1Hexarelin
Growth Hormone Releasing Hexapeptide
Also: Examorelin, GHRP-His-D2Nal
A potent six-amino acid growth hormone secretagogue. Among the strongest GHRPs studied, but notable for also elevating cortisol and prolactin — making it useful for studying GH axis effects with concurrent stress-hormone activation.
62697-90-9DSIP
Delta Sleep-Inducing Peptide
Also: Delta Sleep Peptide, DSIP nonapeptide
A neuropeptide originally isolated from rabbit cerebrospinal fluid during slow-wave sleep. Studied for sleep regulation, stress buffering, pain modulation, and antioxidant effects across decades of European research.
158861-67-7GHRP-2
Growth Hormone Releasing Peptide-2
Also: KP-102, Pralmorelin
A second-generation synthetic hexapeptide GHRP and potent GHSR-1a agonist. More selective than GHRP-6 with less ghrelin-like appetite stimulation, making it widely used in GH axis research protocols.
330936-69-1Humanin
Mitochondrial-Derived Cytoprotective Peptide
Also: HN, Humanin G (HNG — Gly14 variant)
A 21-amino acid mitochondria-encoded peptide discovered through its ability to rescue neurons from Alzheimer's-related death. Like MOTS-c, it belongs to the emerging class of mitochondrial-derived peptides with systemic metabolic and cytoprotective effects.
736992-21-5SS-31
Szeto-Schiller Peptide 31 — Mitochondria-Targeting Antioxidant
Also: Elamipretide, MTP-131
A cell-permeable tetrapeptide that selectively concentrates in the inner mitochondrial membrane by binding cardiolipin. Protects mitochondrial cristae structure and reduces oxidative stress without scavenging ROS directly.
121062-08-6Melanotan II
Cyclic Melanocortin Analog
Also: MT-2, MT-II
A potent cyclic analog of α-MSH that activates melanocortin receptors broadly. Studied for UV-independent melanogenesis, appetite suppression, and as the parent compound of PT-141 (Bremelanotide).
Thymosin Alpha-1
Thymalfasin — Immune Modulating Peptide
Also: Thymalfasin, Zadaxin
A 28-amino acid thymic peptide that modulates T-cell function and cytokine balance. Studied clinically for chronic hepatitis B, sepsis, and vaccine response augmentation for over 30 years.
221231-10-3AOD-9604
Modified hGH Fragment 177-191 (Lipolytic)
Also: AOD9604, hGH Frag 177-191
A modified C-terminal fragment of human growth hormone (amino acids 177-191) with a tyrosine substitution. Studied primarily for its lipolytic (fat-burning) effects without the growth-promoting activity of full-length hGH.
105817-59-6 (Long R3 IGF-1)IGF-1 LR3
Long Arginine-3 Insulin-like Growth Factor-1
Also: Long R3 IGF-1, LR3 IGF-1
A modified recombinant IGF-1 with an arginine substitution and 13-residue N-terminal extension that reduces binding to IGF-binding proteins, increasing bioavailability. The FDA-approved drug mecasermin is the unmodified reference compound.
Sermorelin
GHRH (1-29) Analog
Also: GHRH 1-29, GRF 1-29
A synthetic 29-amino-acid fragment of growth hormone-releasing hormone (GHRH 1-29), FDA-approved as a diagnostic agent for GH deficiency. Stimulates the pituitary to release endogenous growth hormone.
GHRP-6
Growth Hormone Releasing Peptide-6
Also: GHRP6, Hexapeptide
A synthetic ghrelin-mimetic hexapeptide that potently stimulates GH release through the ghrelin receptor. One of the first growth hormone secretagogues developed, with over 25 years of research history.
Kisspeptin-10
Kisspeptin-10 (KP-10) — Reproductive Neuropeptide
Also: KP-10, Metastin (1-10)
The active 10-amino-acid core of kisspeptin, a master regulator of reproductive hormone release. Stimulates GnRH secretion and has been studied in human trials for fertility and reproductive disorders.
Oxytocin
Oxytocin — Neuropeptide Hormone
Also: OT, Pitocin (synthetic)
A nine-amino-acid neuropeptide hormone best known for childbirth and lactation, now studied extensively for social bonding, stress regulation, wound healing, and metabolic effects via intranasal delivery.
LL-37
Cathelicidin LL-37 — Host Defense Peptide
Also: LL37, hCAP-18 fragment
The only human cathelicidin host-defense peptide. Kills bacteria, modulates inflammation, promotes wound healing, and is being studied for infections, sepsis, and tissue repair.
936727-05-8ARA-290
Cibinetide — Innate Repair Receptor Agonist
Also: Cibinetide, ARA 290
A non-erythropoietic peptide derived from erythropoietin (EPO) that activates the innate repair receptor. Studied in Phase 2 clinical trials for neuropathy, inflammation, and tissue protection without EPO’s red-cell effects.
VIP
Vasoactive Intestinal Peptide
Also: VIP peptide, Vasoactive intestinal polypeptide
A 28-amino-acid neuropeptide with potent anti-inflammatory and immunomodulatory actions. Being studied for autoimmune diseases, type 2 diabetes, and antiviral applications.