Peptide glossary
Research-grade overviews of the most-studied peptides. Each entry covers mechanism, typical dose, half-life, reconstitution, side effects, stacks, storage, and FDA status.
BPC-157
BPC-157 is a synthetic pentadecapeptide fragment of body protection compound found naturally in gastric juice. It is …
TB-500
TB-500 is a synthetic peptide fragment based on the active region of thymosin beta-4, a naturally occurring protein i…
Semaglutide
Semaglutide is a long-acting GLP-1 receptor agonist approved for type 2 diabetes and chronic weight management. It sl…
Tirzepatide
Tirzepatide is a synthetic dual incretin agonist activating both GIP and GLP-1 receptors. Clinical trials show weight…
CJC-1295
CJC-1295 is a synthetic analog of growth-hormone-releasing hormone (GHRH). It stimulates the pituitary to release end…
Ipamorelin
Ipamorelin is a selective growth hormone secretagogue that mimics ghrelin at the GHSR-1a receptor. It is prized for s…
GHK-Cu
GHK-Cu is a naturally occurring copper-binding tripeptide with well-studied effects on collagen synthesis, wound heal…
PT-141
PT-141 (bremelanotide) is a synthetic melanocortin receptor agonist developed from melanotan II. It acts on central n…
MOTS-c
MOTS-c is a 16-amino-acid peptide encoded within mitochondrial DNA. It is studied for its role in metabolic regulatio…
Tesamorelin
Tesamorelin is a stabilized analog of human GHRH, FDA approved for reducing excess visceral adipose tissue in HIV-ass…
Retatrutide
Retatrutide is an investigational triple agonist at GIP, GLP-1, and glucagon receptors. Phase 2 trial data reported w…
Hexarelin
Hexarelin is a synthetic growth-hormone-releasing peptide that stimulates pituitary GH release. It is the most potent…
MK-677
MK-677 (ibutamoren) is an orally active, non-peptide ghrelin receptor agonist studied for sustained elevation of GH a…
Selank
Selank is a synthetic heptapeptide modeled on tuftsin. It is studied for anxiolytic, nootropic, and immunomodulatory …
Semax
Semax is a synthetic peptide derived from a fragment of adrenocorticotropic hormone (ACTH). It is studied for cogniti…
Epithalon
Epithalon is a synthetic tetrapeptide (Ala-Glu-Asp-Gly) derived from epithalamin, a pineal gland extract. It is studi…
Thymosin Alpha-1
Thymosin Alpha-1 is a natural immunomodulatory peptide originally isolated from the thymus. It is studied for its eff…
HGH (Somatropin)
Human growth hormone (somatropin) is a recombinant version of endogenous GH. It is FDA approved for several deficienc…
IGF-1 LR3
IGF-1 LR3 is a modified analog of insulin-like growth factor 1 with an extended half-life due to reduced IGF-binding-…
HCG
Human chorionic gonadotropin (HCG) is a glycoprotein hormone that mimics luteinizing hormone (LH). It is used clinica…
Sermorelin
Sermorelin is a truncated 29-amino-acid analog of endogenous growth-hormone-releasing hormone (GHRH). It stimulates t…
GHRP-2
GHRP-2 is a synthetic ghrelin receptor agonist that strongly stimulates growth hormone release. It is often paired wi…
GHRP-6
GHRP-6 is a hexapeptide ghrelin-receptor agonist that strongly stimulates growth-hormone release and appetite. It is …
AOD-9604
AOD-9604 is a synthetic fragment of the C-terminal region of human growth hormone (amino acids 176–191). It was devel…
Melanotan II
Melanotan II is a synthetic analog of alpha-MSH that stimulates melanogenesis (skin darkening) and is studied for its…
Kisspeptin-10
Kisspeptin-10 is a short fragment of the kisspeptin protein that acts as the master regulator of the HPG axis. It sti…
Gonadorelin
Gonadorelin is a synthetic form of endogenous GnRH. It is used in TRT protocols as an HCG alternative to maintain tes…
DSIP
DSIP is a naturally occurring nonapeptide first isolated from the brains of sleeping rabbits. It is studied for effec…
SS-31
SS-31 (elamipretide) is a synthetic tetrapeptide that selectively concentrates in mitochondria, binds cardiolipin on …
Liraglutide
Liraglutide is a once-daily GLP-1 receptor agonist FDA approved for type 2 diabetes (Victoza) and chronic weight mana…
Cagrilintide
Cagrilintide is a long-acting amylin analog developed for once-weekly subcutaneous dosing. It is being studied primar…
Survodutide
Survodutide is a once-weekly dual GLP-1 / glucagon receptor agonist under clinical development for obesity and metabo…
Orforglipron
Orforglipron is an oral non-peptide small-molecule GLP-1 receptor agonist. Unlike semaglutide-in-Rybelsus, orforglipr…
MOD-GRF (1-29)
MOD-GRF (1-29), also sold as CJC-1295 without DAC, is a stabilized analog of the first 29 amino acids of human GHRH. …
IGF-1 DES
IGF-1 DES is a truncated variant of IGF-1 (des[1-3]) with reduced IGFBP-3 binding affinity, producing a stronger loca…
Follistatin-344
Follistatin-344 is a synthetic follistatin peptide that binds and inhibits myostatin and activin, raising the upper c…
NAD+
NAD+ (nicotinamide adenine dinucleotide) is an endogenous redox cofactor central to mitochondrial energy production, …
5-Amino-1MQ
5-Amino-1MQ is a small-molecule inhibitor of nicotinamide N-methyltransferase (NNMT), an enzyme implicated in metabol…
KPV
KPV is the C-terminal tripeptide (Lys-Pro-Val) of alpha-melanocyte-stimulating hormone (α-MSH). Research focuses on i…
LL-37
LL-37 is the active C-terminal fragment of the human cathelicidin hCAP-18. It has broad-spectrum antimicrobial activi…
HGH Fragment 176-191
HGH Fragment 176-191 is a synthetic peptide corresponding to the C-terminal region of human growth hormone. It is stu…
Mechano Growth Factor
Mechano Growth Factor (MGF) is a splice variant of IGF-1 (IGF-1Ec) produced locally in skeletal muscle in response to…
Cerebrolysin
Cerebrolysin is a neurotrophic peptide preparation derived from pig brain, used clinically outside the US for stroke,…
Dihexa
Dihexa is an orally bioavailable angiotensin IV analog designed to cross the blood–brain barrier and potentiate hepat…
Glutathione
Glutathione (GSH) is a tripeptide (glutamate-cysteine-glycine) that serves as the cell's primary endogenous antioxida…
Every peptide, tracked automatically
Peptide Protocol keeps your schedules, doses, and side-effect logs in one focused iPhone app.
See the app →Educational use only. Peptide Protocol is an informational tool. Nothing on this page constitutes medical advice. Many peptides are prescription-only or restricted in your jurisdiction. Always consult a licensed healthcare professional before injecting any compound.