Obesity is a term used to describe someone who is very overweight. When we eat more than our body needs some of the extra energy gets stored as fat. However many people have too much body fat. This can cause health problems. To understand why some people are overweight or obese you need to know what your body does with the food you eat. Clear concise information in this book explains how the body turns fat into energy and describes what happens if you store more fat than your body actually needs.