Your white adipose tissue (body fat) is the main type of fat in your body. It’s located beneath your skin, around internal organs, in the middle cavity of your bones.Leptin is a hormone your white adipose tissue releases that helps your body maintain your normal weight on a long-term basis. It does this by regulating hunger by providing the sensation of feeling full.The amount of leptin in your blood is directly proportional to the amount of adipose tissue your body has. In other words, the less body fat, the less leptin you have, and the more body fat, the more leptin you have.