There’s another type of fat cell known as the “brown fat cell.” Science is still revealing the mysteries of it, but it’s safe to refer to it as beneficial. Mostly stored in small deposits like the neck, shoulders, and collarbone areas, it’s packed with iron which gives it its color. When a brown fat cell burns, it produces heat but without producing “shivering.” That means this is the kind of fat you don’t want to burn. However, you may want to convert your white fat into brown cells to lose weight and to achieve a healthier body. Christian Wolfrum, PhD says, “Creating just 2 ounces of active brown fat could increase your calorie burn by 20%.”