HGH 191AA (Somatropin) is a recombinant human growth hormone with 191 amino acids. It is studied for GH receptor signaling, IGF-1 axis, body composition, and metabolic regulation research.
| Purity | >98% |
| Form | Lyophilized powder |
| Storage | -20°C |
Science-backed research overview for this compound
HGH 191AA is recombinant human growth hormone (somatropin) — a 191-amino acid single-chain polypeptide identical to endogenous pituitary GH. The "191AA" designation distinguishes it from the older immunogenic 192AA variant (somatrem) which had an extra methionine residue.
GH binds GH receptors activating JAK2-STAT5 signaling for lipolysis and cellular proliferation. It stimulates hepatic IGF-1 production which drives protein synthesis and cell survival. GH levels decline ~14% per decade after age 30 (somatopause), making it central to aging research.