What is Whey Protein Isolate (WPI) made from?Updated a year ago

Whey is isolated from milk. Milk contains two main proteins - casein (80%) and whey (20%). Whey is present in the liquid part of milk and is a by-product of the cheese-making process. Whey tends to contain 9 essential amino acids, which can help improve your muscle mass.

Whey protein isolate is made by using enzymes to curdle milk and separate the watery part. The manufacturers pasteurize this liquid whey and process it until it is refined. They use two processes called Membrane Filtration and Ion Exchange Technology (The Island Now. 2022).