The directory.

Collagen dipeptides, principally Pro-Hyp (Prolyl-Hydroxyproline) and Hyp-Gly (Hydroxyproline-Glycine), are the primary bioavailable fragments generated during digestion of hydrolyzed collagen supplements.

Collagen peptides are short-chain amino acid sequences derived from enzymatic hydrolysis of native collagen (types I, II, and III).

Cortistatin is a neuropeptide belonging to the somatostatin family, existing in three biologically active isoforms: CST-14, CST-17, and CST-29.

Defensins are a family of small (2–5 kDa) cationic antimicrobial peptides with a β-sheet core stabilized by three intramolecular disulfide bonds.

Desmopressin (DDAVP) is a synthetic analogue of the endogenous posterior pituitary hormone arginine vasopressin (AVP), modified at two positions: deamination of the N-terminal cysteine (1-desamino) and substitution of L-arginine with D-arginine at position 8.

Dulaglutide is a once-weekly injectable GLP-1 receptor agonist developed by Eli Lilly and FDA-approved in 2014.

Exenatide is a synthetic version of exendin-4, a naturally occurring peptide found in the venom of the Gila monster lizard.

Fibronectin peptides are bioactive fragments derived from the large extracellular matrix glycoprotein fibronectin, primarily containing the RGD cell-adhesion motif and the synergy sequence PHSRN.

Follistatin-315 is the primary circulating isoform of follistatin, a glycoprotein that binds and neutralizes members of the TGF-β superfamily, most notably myostatin (GDF-8) and activin A.

Follistatin-344 is the 344-amino acid isoform of follistatin, a naturally occurring glycoprotein that potently inhibits myostatin and activin A — two TGF-β superfamily members that limit muscle growth.

FOXO4-DRI is a synthetic D-amino acid retro-inverso peptide designed to selectively eliminate senescent cells — aged, dysfunctional cells that accumulate with age and drive chronic inflammation.

GHRH is the endogenous 44-amino acid hypothalamic peptide that drives pulsatile growth hormone secretion from the anterior pituitary.

Gramicidin (gramicidin D) is a mixture of linear 15-amino acid antimicrobial peptides produced by Bacillus brevis, comprising gramicidin A (~80%), B (~5%), and C (~15%).

Histrelin is a potent synthetic GnRH agonist nonapeptide delivered via a subcutaneous hydrogel implant providing continuous hormone release for 12 months.

IGF-1 LR3 (Long R3 Insulin-like Growth Factor-1) is a 83-amino acid recombinant analog of native IGF-1, engineered with a 13-amino acid N-terminal extension and an arginine substitution at position 3.

Lixisenatide is a once-daily short-acting GLP-1 receptor agonist derived from exendin-4, modified at the C-terminus with deletion of one proline and addition of six lysine residues.

Magainin is a family of broad-spectrum antimicrobial peptides isolated from the skin of the African clawed frog Xenopus laevis, first characterized by Michael Zasloff in 1987.

Mazdutide (IBI362, LY3305677) is a once-weekly dual GLP-1 receptor and glucagon receptor agonist developed by Innovent Biologics in partnership with Eli Lilly, modeled on mammalian oxyntomodulin.

Melanotan II is a synthetic analog of alpha-melanocyte stimulating hormone (α-MSH) that stimulates melanogenesis (skin tanning) and has secondary effects on sexual arousal and appetite suppression.

MIF-1 (Melanocyte Inhibiting Factor 1), also designated Pro-Leu-Gly-NH2 or PLG, is a cyclic tripeptide endogenously derived from oxytocin.