Whey Protein Isolate vs Concentrate: Which One Should You Choose?

What is whey protein isolate?

Whey protein isolate (WPI) is the purest form of whey protein, containing 90-95% protein by weight.

Key differences

The main differences come down to protein percentage, fat content, lactose levels, and price.

Our recommendation

If you are lactose intolerant or on a calorie deficit, go with isolate. If budget matters more, concentrate works just as effectively.