Whey protein is nowadays maybe the most significant supplement. After several studies and a lot of research, it is common knowledge that Whey Protein is the most valuable and most nutritious type of protein. That is why it is often referred as the gold standard of protein. It is being extracted from cow's milk along with Casein Protein. Although Casein Protein is also extremely nutritious, Whey Protein is more popular because of its ability to get quicker absorbed from the organism and helps the muscles recover after a hard workout.