The numbers on your scale do not indicate whether you are fit or fat. Far more significant than your total body weight is the composition of your body tissue. If a man’s fatty tissue is bigger than 14% up to 15% of his body mass, or if a woman’s is more than 20% to 22%, he or she is overweight, or more precisely, overfat.

Whey protein is actually a term used to describe a group of globular proteins that can be separated from whey. When cow’s milk is used to manufacture cheese, it also leads to the production of whey, which may or may not be discarded. It is a mixture of lactoglobulin, alpha-lactalbumin and serum albumin.