AICAR (5-Aminoimidazole-4-carboxamide ribonucleotide) is a synthetic compound that activates AMP-activated protein kinase (AMPK), a crucial enzyme involved in regulating cellular energy balance. By stimulating AMPK, AICAR promotes fat loss, improves endurance, and enhances metabolic efficiency. It has been extensively studied for its potential benefits in athletic performance, fat metabolism, and as a potential treatment for metabolic disorders. AICAR’s effects on energy utilization make it a valuable tool in research related to endurance, weight management, and muscle recovery.