Ingredient

Hydrolyzed Whey Protein Isolate

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Source
Animal-derived
Allergen
No
Role in food
Manufacturers add it to foods as a source of protein. It is commonly found …

What it is

Hydrolyzed whey protein isolate is a highly purified form of whey protein, a byproduct of cheese production. It is made by breaking down the protein into smaller pieces (peptides) through a process called hydrolysis, which can make it easier to digest and absorb.

Why it's used

Manufacturers add it to foods as a source of protein. It is commonly found in protein bars, meal replacement supplements, and sports nutrition products like protein powders and recovery drinks.

Health notes

Hydrolyzed whey protein isolate is generally recognized as safe (GRAS) by the FDA when used as intended. It is a source of essential amino acids that support muscle growth and repair. International bodies like JECFA and EFSA have evaluated whey proteins. Evidence does not suggest adverse effects from typical consumption.

Allergen info

Hydrolyzed whey protein isolate is derived from milk, which is one of the 9 FDA major allergens. It does not contain gluten.

Products containing Hydrolyzed Whey Protein Isolate

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Peanut Butter Cup Bar, Peanut Butter Rexall Sundown, Inc. Peanut Butter Cup Bar, Peanut Butter Snack, Energy & Granola Bars High in saturated fat — 20% DV per serving 400kcal 40Protein 16Fat 34Carbs Cookie Dough Protein Bar, Cookie Dough Rexall Sundown, Inc. Cookie Dough Protein Bar, Cookie Dough Snack, Energy & Granola Bars High in saturated fat — 22% DV per serving 380kcal 40Protein 14Fat 34Carbs Chocolate Caramel Bar, Chocolate Caramel Rexall Sundown, Inc. Chocolate Caramel Bar, Chocolate Caramel Snack, Energy & Granola Bars High in saturated fat — 22% DV per serving 380kcal 40Protein 12Fat 36Carbs Rexall Sundown, Inc. Chocolate Caramel Protein Bars, Chocolate Caramel Snack, Energy & Granola Bars High in saturated fat — 22% DV per serving 380kcal 40Protein 12Fat 36Carbs Peanut Butter Cup Bar, Peanut Butter Rexall Sundown, Inc. Peanut Butter Cup Bar, Peanut Butter Snack, Energy & Granola Bars High in saturated fat — 20% DV per serving 400kcal 40Protein 16Fat 34Carbs Peanut Butter Cup Bar, Peanut Butter Rexall Sundown, Inc. Peanut Butter Cup Bar, Peanut Butter Snack, Energy & Granola Bars High in saturated fat — 20% DV per serving 400kcal 40Protein 16Fat 34Carbs Cookie Dough Protein Bar, Cookie Dough Rexall Sundown, Inc. Cookie Dough Protein Bar, Cookie Dough Snack, Energy & Granola Bars High in saturated fat — 22% DV per serving 380kcal 40Protein 14Fat 34Carbs Cookie Dough Bar, Cookie Dough Rexall Sundown, Inc. Cookie Dough Bar, Cookie Dough Snack, Energy & Granola Bars High in saturated fat — 22% DV per serving 380kcal 40Protein 14Fat 34Carbs Marshmallow Crispy Treat Bar, Marshmallow Rexall Sundown, Inc. Marshmallow Crispy Treat Bar, Marshmallow Snack, Energy & Granola Bars 400kcal 40Protein 12Fat 38Carbs Cookie Dough Bars, Cookie Dough Rexall Sundown, Inc. Cookie Dough Bars, Cookie Dough Snack, Energy & Granola Bars High in saturated fat — 22% DV per serving 380kcal 40Protein 14Fat 34Carbs Iso100 Hydrolyzed Protein 25G, Bcaas 5.5G, Leucine 2.7G 100% Whey Protein Isolate Protein Powder, Cinnamon Bun, Cinnamon Bun Dymatize Enterprises, LLC Iso100 Hydrolyzed Protein 25G, Bcaas 5.5G, Leucine 2.7G 100% Whey Protein Isolate Protein Powder, Cinnamon Bun, Cinnamon Bun Energy, Protein & Muscle Recovery Drinks 387kcal 80.7Protein 2.1Fat 6.5Carbs Cinnamon Churro Flavored America's Original Craveable Nutrition Bar, Cinnamon Churro McCormick & Company, Inc. Cinnamon Churro Flavored America's Original Craveable Nutrition Bar, Cinnamon Churro Snack, Energy & Granola Bars High in saturated fat — 20% DV per serving 381kcal 23.8Protein 11.9Fat 52.4Carbs
Salt (64 products) Whey Protein Isolate (61 products) Soy Lecithin (57 products) Sucralose (44 products) Natural Flavors (37 products) Sugar (33 products) Water (32 products) Processed With Alkali (31 products) Casein (29 products) Milk Protein Isolate (27 products)

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.