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Whey is the liquid remaining after Dairy milk has been curdled and strained. It is a byproduct of the manufacture of cheese or casein and has several commercial uses.

Whey protein is commonly marketed as a dietary supplement. It is found as a food additive in many protein-powders and snack bars.

People who follow Vegan and Plant-based diets, or who are lactose intolerant, do not consume it.


  • Whey protein concentrate
  • Whey protein hydrolysate
  • Whey protein isolate


Throughout history, whey was a popular drink in inns and coffee houses. Today it is common additive in many processed foods, including: breads, crackers, commercial pastries, and in animal feed.