This book is an attempt to educate the people who really want to lose weight on their own. Not only we will inform them about the calories but also we will try to tell them how to practically follow this knowledge. There are 201 questions and answers which will make it easy for them to understand what they have in mind. All obese people want to lose weight. But they do not understand the science behind this weight gain and loss. They do not know which foods are helpful for loosing weight and which are for gaining weight. Seeing the lucrative advertisements from slimming centres they empty their pockets and join them in the hope of losing weight. They lose weight and gain them back after they discontinue the slimming centres – as the knowledge is still missing. This book is an attempt to educate the people who really want to lose weight on their own.