What amount of energy used each day by children, man & women of different age group.

How will we know how much energy a person requires daily? It depends on three factors. 1. Metabolism 2. physical labour and 3. Influence  of food.

Our daily foods should be according to our needs. While selecting foods we should  keep in mind that the body can obtain necessary amount of calorie from food and it should contain vitamins, mineral salts and other necessary nutrients also.