Obesity is a multifactorial metabolic disorder with limited treatment options capable of sustaining weight loss and improving systemic metabolic health. MicroRNA-22 (miR-22) has emerged as an essential regulator of metabolic homeostasis, influencing lipid biosynthesis, mitochondrial function and brown adipose tissue development. These roles position miR-22 as a promising target for therapeutic intervention in obesity and related disorders such as metabolic dysfunction-associated steatotic disease (MASLD) and its progressive disease state, metabolic dysfunction-associated steatohepatitis (MASH).