Whey Protein Isolate (WPI): Protein, Calories & Full Nutrition Breakdown

Why Whey Protein Isolate (WPI) shows up in protein-forward diets

Micro- or ultra-filtered to strip out almost all the fat and lactose that concentrate keeps, which is why isolate typically costs 20-40% more per pound for a protein number that's only modestly higher.

Serving-size math

A 1 scoop (30g) portion delivers 27.0g of protein and roughly 111 calories. Scaled per 100 calories, that works out to 24.32g of protein — useful for comparing against other foods on a calorie-matched basis rather than a weight-matched one.

Prep tip

Worth the upgrade over concentrate specifically if you're lactose-sensitive or trying to hit a very low daily fat/carb target — otherwise concentrate performs almost identically for muscle-building purposes.

Best for

• cutting
• lactose sensitivity

Allergens

Contains: dairy, milk (trace).

Frequently asked