Milk is an essential food in our diet because of its balanced composition of nutrients (proteins, lipids, glucids and minerals). It is used for the preparation of various food and beverage products. Dairy ingredients are food ingredients made from milk and are used in preparing various food products such as ice creams, chocolate, sports food, clinical nutrition, bakery-snacks, pork meat, ready-to-eat, prepared deserts and soups. Dairy ingredients are divided into various categories such as milk powder (dried form of milk manufactured by evaporating milk to dryness. Main purpose of drying milk is to preserve it as milk powder has longer shelf life than liquid milk and does not need to be refrigerated, due to its low moisture content), whey ingredients, milk protein concentrates & milk protein isolates (substance obtained by partial removal of non-protein constituents such as, lactose and minerals from skim milk so that the finished dry product contains 90% or more protein by weight) and lactose & its derivatives. Major end-users of dairy ingredients are bakery & confectionery, dairy, convenience foods, sports & clinical nutrition products.