Whey protein concentrate is the cheapest and most common form of whey protein. Whey protein concentrate is a common athletic supplement used to increase dietary protein intake, often with the goal of maximizing muscle hypertrophy.
Whey protein typically comes in three major forms: concentrate (WPC), isolate (WPI), and hydrolysate (WPH).
Concentrates typically a low (but still significant) level of fat and cholesterol but, in general, have higher levels of bioactive compounds as well as carbohydrates in the form of lactose — they are only 29%–89% protein by weight.