Overview Whey, once an environmentally- troublesome waste product of the cheese making process, has become a significant revenue stream for U.S. cheese producers. Whey protein con- centrate is dried and sold for use in many products, including nutritional beverages, baked goods, processed foods, and animal feed. The lactose that is removed from the whey can also be dried into powder and sold for use in infant formula and pharmaceu- tica

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