Ingredient

Case

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Source
Animal-derived
Allergen
No
Role in food
Manufacturers add case to foods as a source of protein, for its emulsifying properties, …

What it is

Case is the general term for the primary protein found in milk. It makes up about 80% of the protein in cow's milk. Case is separated from milk during the cheese-making process and can also be isolated for use in other food products.

Why it's used

Manufacturers add case to foods as a source of protein, for its emulsifying properties, and to improve texture. It is often found in dairy products like yogurt and cheese, as well as in protein bars and nutritional supplements.

Health notes

Case is generally recognized as safe (GRAS) by the FDA for use in food. It is a complete protein, providing all essential amino acids. While some individuals have milk allergies or lactose intolerance, case itself is not typically associated with these issues unless the milk source is problematic. JECFA has evaluated case and its derivatives.

Allergen info

Case is derived from milk, which is one of the 9 FDA major allergens. It does not contain gluten.

Products containing Case

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Last updated: September 28, 2026

Note: This site presents label data from USDA FoodData Central for general information. It is not medical advice. Check the package label; formulations change.