This can be done by calculating your Body Mass Index (BMI), waist to hip ratio, waist circumference, and/or body fat percentage. Before starting a new program, you need to learn your body composition and to measure parts of your body to track your progress. Your body can store fat not just in your muffin top but in your hips and thighs. This is the type that surrounds your internal organs in the abdominal cavity. The other type, which is the most harmful is visceral fat. Lipolysis can lead to long-term weight gain. When you poke your belly, that’s the type of fat that you feel. Subcutaneous fat is the fat that sits below the skin. Before getting into the flat belly diet, know that there are two types of belly fat, visceral fat, and subcutaneous.