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Always animal

Whey

Common US / international name: whey / whey protein

Origin
Liquid left after cheese making; concentrated as whey protein.
Where it typically appears
Protein powders, baked goods, snacks, ice cream, infant formula.
Product groups
Dairy, Sweets, Bakery
Source
Open Food Facts ingredients taxonomy (ODbL); food chemistry references. As of September 1, 2026