Nutrition is the science that deals with all the various factors of which food is composed and the way in which proper nourishment is brought about. The intake of food and supplements in the body is utilized for maintaining health, growth and energy. This is made possible with the basic nutrients available in the food.

The good food mainly consists of Macronutrients Micronutrients and water. The Macronutrients include carbohydrates, fats and proteins whereas the micronutrients are vitamins and minerals. All these are very essential factors for normal functioning of the body. The average nutritional requirement for different for different groups of people and entirely depends age, sex, height, weight, degree of activity and rate of growth.

Food taken in any form either solid or liquid supplies the body a means to produce energy of any form; the available nutrition in the food promotes growth, and maintenance of the body. Proper nutrition is only possible when the diet taken is balanced and the food consumed contains all the basic nutrients.

No single food is rich in all the nutrients so variety of food should be included to fulfill all the requirements of the body as far as nutrients are concerned. When the food consumed does not fulfill the requirements of nutrients, it leads to malnutrition or under nutrition.