ADIG (adipogenin) is a microprotein predominantly expressed in adipose tissues that plays a central role in adipocyte differentiation and lipid storage 1. Mechanistically, ADIG functions by binding selectively to the dodecameric form of seipin, a lipid droplet biogenesis factor, where it stabilizes and bridges adjacent seipin subunits to enhance complex assembly 1. This ADIG-seipin interaction promotes lipid droplet development at both early and late developmental stages, facilitating triglyceride accumulation in adipose tissues 1. In transgenic mice, adipocyte-specific ADIG overexpression increases fat mass and enlarges lipid droplets, while ADIG deletion disrupts triglyceride accumulation in brown adipose tissue, demonstrating its essential role in lipid homeostasis 1. Additionally, ADIG expression is regulated by dietary interventions; in Western diet-induced metabolic syndrome models, lipid metabolism-related genes including Adig are modulated by polyphenol supplementation, suggesting ADIG's involvement in metabolic disease progression 2. These findings establish ADIG as a critical regulator of adipogenesis and lipid storage with potential therapeutic implications for obesity and metabolic disorders, though specific clinical applications remain to be determined.