The invention discloses the uses of hydroxyl polymethoxylflavones and derivative thereof that are relative to inhibit adipogenesis and lower lipid accumulation, wherein the hydroxyl polymethoxylflavones is obtained from the peels of Citrus genus plants. Therefore, the hydroxyl polymethoxylflavones that of a therapeutically effective amount not only can be a medical compound for treatment obesity or fatty liver, but also can be a food element.
