Live Science Plus
Milk is nature's buffet for babies, providing all the nutrition a mammalian infant needs for early development outside the womb. Cow's milk provides a range of nutrients for humans, although intolerance to lactose — a difficult-to-digest sugar — is a common affliction.
Milk consists of about 5 percent lactose, 3.7 percent fats and 3.5 percent proteins. Calcium-rich casein is by far the most common protein, and it is the combination of casein and certain fats that give bovine juice its color.
