The peptide frontier, mapped from the source.
Short chains of amino acids, outsized reach — from the signals that run the body to the compounds redrawing the edge of research and discovery. PeptideHormone is the independent, research-grade catalog of peptide science: every signaling family, the molecules that matter, and the evidence behind them — sourced, graded, and cross-linked, with pharmacokinetic tools.
The catalog, by signaling family
The whole landscape, mapped into the families that share receptors, anatomy, and logic — each a hub of the molecules that matter and the evidence behind them. Open any one for the full reference.
Browse the full catalogIncretins & metabolic
Glucose-dependent signaling that reshaped obesity and diabetes care.
GLP-1 · GIP · glucagon · amylin · insulin
Growth & repair
The somatotropic axis and the secretagogues that pulse it.
GH · IGF-1 · GHRH · ghrelin · GHRPs
Melanocortins
Pigmentation, appetite, inflammation, and sexual function from one receptor family.
α-MSH · MC1R–MC5R · setmelanotide
Neuropeptides
Hypothalamic and posterior-pituitary signals that tune behavior and fluid balance.
oxytocin · vasopressin · CRH · TRH
Gut & appetite
The enteroendocrine peptides that report on the meal you just ate.
PYY · CCK · secretin · motilin
Reproductive & gonadal
Pulsatile control of the reproductive axis, from hypothalamus to gonad.
GnRH · LH · FSH · kisspeptin · hCG
Adipokines & energy balance
The hormones fat tissue uses to report energy reserves to the brain.
leptin · adiponectin
Calcium & bone
The peptide hormones that hold blood calcium in a tight range.
PTH · calcitonin · PTHrP
Cardiovascular & natriuretic
Peptides the heart and vessels use to manage pressure and fluid.
ANP · BNP · CNP
Muscle & TGF-β signaling
The signals that cap muscle growth — and the targets for releasing the brake.
myostatin · activin A · follistatin
Repair & regenerative
Endogenous repair signals — and the community 'research peptides' that target them.
thymosin β4 · GHK-Cu · BPC-157 · TB-500
Mitochondrial-derived peptides
Short peptides encoded inside the mitochondrial genome that signal to the cell.
MOTS-c · humanin
A reference you can trust the edges of
The peptide space is loud with marketing and thin on rigor. This is the opposite: built to be checked.
Sourced, not asserted
Every mechanism traces to primary literature, structural data, and registered trials — cited, not paraphrased into authority.
Research-grade, not medical
Reference material for understanding the biology. Nothing here is medical advice, a recommendation, or a substitute for a clinician.
Independent
No products, no storefront, no sponsored conclusions. The incentive is to be correct, not to sell.