Precision Standards for Peptide Research

MOTS-c is a 16-amino acid mitochondrial-derived peptide encoded within the mitochondrial 12S rRNA gene. It acts as an exercise-mimetic and systemic metabolic regulator, exerting potent metabolic control by targeting skeletal muscle to stimulate AMP-activated protein kinase (AMPK) phosphorylation and activate the AICAR transformylase pathway, bypassing canonical upstream kinase cascades.

GHK-Cu is a naturally occurring human blood tripeptide (glycyl-L-histidyl-L-lysine) complexed with copper(II) ions. It regulates over 4,000 human genes, restoring gene expression to a healthier, youthful profile. It upregulates collagen and glycosaminoglycan synthesis, stimulates decorin, modulates matrix metalloproteinases (MMPs) and tissue inhibitors of metalloproteinases (TIMPs), and exhibits potent antioxidant and anti-inflammatory activity.

NAD+ is a critical coenzyme found in all living cells, essential for fundamental metabolic processes including glycolysis, the Krebs cycle, and oxidative phosphorylation. Beyond redox biochemistry, NAD+ serves as an obligatory substrate for sirtuins (SIRT1-7), poly(ADP-ribose) polymerases (PARPs), and cyclic ADP-ribose synthases (CD38/CD157), directly governing cellular longevity pathways, epigenetic regulation, and mitochondrial homeostasis.

Somatropin is a 191-amino acid single-chain polypeptide hormone produced via recombinant DNA technology, structurally and chemically identical to endogenous human growth hormone (hGH). It binds with high affinity to dimeric growth hormone receptors (GHR), inducing intracellular Janus kinase 2 (JAK2) phosphorylation and triggering the STAT5 signaling pathway. This activates transcription of Insulin-Like Growth Factor 1 (IGF-1) in hepatic and peripheral tissues, promoting protein synthesis, chondrogenesis, and cellular proliferation.

CJC-1295 (Modified GRF 1-29) is a synthetic 29-amino acid peptide analogue of Growth Hormone Releasing Hormone (GHRH). It features D-Ala, Gln, Ala, and Leu substitutions at positions 2, 8, 15, and 27, conferring significant resistance against cleavage by dipeptidyl peptidase-4 (DPP-4). CJC-1295 binds to the GHRH receptor on anterior pituitary somatotroph cells, activating the cAMP/protein kinase A (PKA) signaling cascade and inducing pulsatile, physiological release of endogenous growth hormone while maintaining natural feedback inhibition mechanisms.

Ipamorelin is a synthetic pentapeptide (Aib-His-D-2-Nal-D-Phe-Lys-NH2) and a selective growth hormone secretagogue (GHS). It acts as an agonist at the Growth Hormone Secretagogue Receptor 1a (GHSR-1a / ghrelin receptor). Unlike older secretagogues such as GHRP-6 or GHRP-2, Ipamorelin does not induce significant off-target elevations in adrenocorticotropic hormone (ACTH), cortisol, prolactin, or aldosterone, making it an extraordinarily clean and selective pharmacological tool for isolated somatotroph stimulation research.