Peptide

KPV and alpha-MSH compared from the primary literature: identity, melanocortin receptor data, PepT1 uptake, results in MC1R-null mice, and what the studies do not show.

MOTS-c and humanin compared from the primary literature: mitochondrial origin, identity, AMPK and nuclear signalling versus humanin's receptors and binding partners, and the one direct study.

Selank and DSIP compared from the primary literature: identity, Selank's GABA and enkephalinase data, the unresolved DSIP sleep-factor question, and what no study has tested.

PT-141 and kisspeptin-10 compared from primary studies: identity, receptors, rodent behaviour and hormone readouts, half-life data and where MC4R meets kisspeptin neurons. Research use only.

LL-37 and KPV compared from primary studies: origin, structure, antimicrobial and anti-inflammatory evidence, gut models and study-design notes. Research use only.

Cagrilintide and pramlintide compared: two amylin analogues sharing a proline triad, with cagrilintide's extra substitutions and lipid, half-life, receptor data and regulatory status.

Tesamorelin and CJC-1295 compared: two GHRH analogues that resist DPP-4 in different ways, with half-life data, the no-DAC naming issue and regulatory status.

Melanotan I (afamelanotide) and Melanotan II compared: linear vs cyclic structure, melanocortin receptor binding, rodent research and regulatory status.

AOD-9604 vs HGH Fragment 176-191: how the two names map to sequences one residue apart, their PubChem identities, and what rodent and tissue studies tested.

IGF-1 LR3 vs native IGF-1: how a 13-residue extension and an Arg3 swap cut IGF-binding-protein capture, and what cell and animal studies did and did not show.