Diet is related to food and drink in general. Food and drink considered with regard to their nutritional qualities, composition, and effects on health. Diet is the customary amount and kind of food and drink taken by a person from day to day, in order to get the required energy for the body. a diet is planned to meet specific requirements of the individual, including or excluding certain foods. The common characteristic of an obese person is his/her over body weight. When a person gained more than 20% of the standard normal body weight in accordance with height age and body structure, that person may considered as started reaching in the obese category