Acid Whey
Acid whey supplies whey proteins, lactose, calcium, and potassium. It contains milk allergens and lactose, so it is not appropriate for people with milk allergy or significant lactose intolerance.
What it is
Liquid byproduct of acid-coagulated dairy (Greek yogurt, cottage cheese, cream cheese), high in lactose and lactic acid.
Functional dairy ingredient; in food, used in protein powders, beverages, and animal feed.
Why it's flagged
- Milk allergen
- Lactose for those with intolerance
What regulators actually say
"Whey is the fluid obtained by separating the coagulum from milk, cream, and/or skim milk in cheesemaking. ... GRAS as a direct human food ingredient."
"Milk ... is one of the nine major food allergens identified by law that must be declared on the label."
Regulatory status
United States — FDA
Dairy ingredient; whey standards at 21 CFR 184.1979 (whey is GRAS); milk is a major allergen requiring declaration.
European Union — EFSA
Conventional dairy ingredient; milk listed in Annex II of Reg. 1169/2011 as allergen.
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