AICAR vs Ipamorelin

Converted intracellularly to ZMP, a potent AMPK activator. AMPK activation increases fatty acid oxidation, glucose uptake, and mitochondrial biogenesis — the same metabolic pathways activated by sustained aerobic exercise.

A cell-permeable nucleoside analog that activates AMPK, mimicking cellular exercise signals. Studied for endurance enhancement and metabolic disease research. Not a true peptide — a synthetic nucleoside frequently sold by peptide vendors.

Ipamorelin binds to the ghrelin receptor (GHSR-1a) and stimulates dose-dependent GH release with a clean hormonal profile. Unlike GHRP-6 or hexarelin, it does not significantly stimulate appetite-related pathways or cortisol secretion at standard research doses. This selectivity makes it a frequently studied peptide for protocols where hormonal side-effect profiles are a consideration.

Ipamorelin is a selective growth hormone secretagogue and ghrelin receptor agonist. It stimulates pulsatile GH release from the anterior pituitary with high selectivity — producing minimal effect on cortisol, prolactin, or ACTH compared to earlier GHRPs. It is commonly researched for its role in supporting body composition, recovery, and lean mass maintenance.