White adipose tissue (WAT) is a type of fat found in the body that primarily stores energy. It consists of large cells filled with fat droplets, which can expand or shrink based on energy intake and expenditure. WAT also plays a role in regulating metabolism and producing hormones, such as leptin, which helps control appetite. In addition to energy storage, white adipose tissue serves as insulation and cushioning for organs. It is distributed throughout the body, particularly under the skin and around vital organs. Excessive accumulation of WAT can lead to health issues, including obesity and related diseases like type 2 diabetes and heart disease.