Milk is the only food of the young mammal during the first period of its life. The substance in milk provides both energy and the building materials necessary for growth. Milk also contains antibodies which protect the young mammal against infection. Milk is considered as a complete and ideal food and it contains most of the proximate principles of a well balanced diet. Milk of various mammals is used for food but cow's milk is being used throughout out the world for feeding infants and as a supplement to the diets of the children and adults. The other animal's milk used is buffalo, goat, sheep, and camels. This nutrient packed drink is given to patient even during critical stage. Various milk products such as curd, butter milk, ghee, cheese, pannier, khoya, rabri etc are used commonly in our food preparations. This time tested nutritious drink is been criticized by few vocal people to the extent that milk is equated to poison.