There are many types of protein available to us but whey protein is by far the most popular.
There are many reasons for whey protein to be the most successful amongst consumers. For starters, it tastes nice and is a low cost high quality protein. It has an excellent nutrient makeup which includes all of the essential amino acids and it is especially high in branched-chain amino acids which are key for muscle protein synthesis.
Whey is also considered a fast protein source as it is digested rapidly (amino acid levels tend to peak between 60-90 minutes after ingestion). The speed at which whey protein is digestible makes it an excellent recovery aid to replenish the amino acid pool immediately post-training.