This is Milk Milk is the nutrient fluid produced by the mammary glands of female mammals. The female ability to produce milk is one of the defining characteristics of mammals. It provides the primary source of nutrition for newborns before they are able to digest more diverse foods. Humans, like other mammals, consume mother's milk during their infancy, but many human societies consume the milk of domesticated ruminants as well, especially milk from cows, but also that from sheep, goats, yaks, water buffalo, and camels. Milk can be processed into dairy products such as cream, butter, yogurt, ice cream, cheese, casein, whey protein, lactose, condensed milk, powdered milk, and many other food-additive and industrial products. Milk contains significant amounts of saturated fat, protein and calcium. The term milk is also used for the processed meat and juice of the coconut, non-animal substitutes such as soy milk, rice milk and almond milk, and even the regurgitated substance pigeons feed their young called crop milk, which bears little resemblance to mammalian milk.