There are three different types of fat: white, brown, and beige; and each acts differently and is present in different amounts depending on where the fat is located. For example, white adipose tissue has been associated with inflammation, and in breast cancer patients, has been associated with worse prognosis. Fat exists both under the skin and deeper inside the body surrounding internal organs (called visceral fat). Healthy diets and exercise that builds lean muscle mass can help fight the development of excess fat.