www.naturalcellulitecure.com Whey protein is available in these forms: Whey protein concentrate, in which roughly 80 percent of calories come from protein even though the quantity of protein can differ from 25 to 89 percent; whey protein identify, by which typically greater than 90 percent of the calories result from protein; and whey protein hydrolysates, by which typically greater than 90 percent of the calories originate from protein.