Nutrition means either preparation of food or Supply of nutrients for the release of energy. The chemical substances required for the production of energy, for the growth and for body building are called Nutrients The procurement of nutrients is called Nutrition. This lecture briefly present on Nutritional Requirements. The important nutrients required for the body are carbohydrates, fats, proteins , vitamins and minerals. Some nutrients like carbohydrates, proteins, fats and mineral like sodium are required in large quantities and they are known as Macro-nutrients.