Milk is made of two proteins, casein and whey. Whey protein can be separated from the casein in milk or formed as a by-product of cheese making. Whey protein is considered a complete protein as it contains all 9 essential amino acids. It is low in lactose content.

There are many benefits associated with the consumption of whey protein, and researchers are constantly finding new possible therapeutic properties. Here, we explain what the benefits might be, and look at some of the side effects and potential risks.