Whey protein supplements are popular because of their high biological protein value. Biological protein value is used to measure the quality of protein. Foods with a high biological protein value are considered higher in quality.

Whey Protein is one of the primary proteins found in dairy products. A byproduct of the cheese-making process, whey protein provides substantial amounts of amino acids which are needed to carry out the functions that proteins perform in the body.

People commonly take whey protein to improve athletic performance and address nutritional deficiencies.