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Whey isolate vs whey concentrate: when each makes sense

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By NSW Editorial Team · Reviewed by the NSW Editorial Board · Updated

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Quick answer

Whey concentrate is approximately 70 to 80 percent protein by weight; the remainder is lactose, fat, and minerals. Whey isolate is 90 percent or more protein with minimal lactose. Isolate is better for lactose-sensitive users and cleaner macros; concentrate is cheaper per gram and may have minor immunoglobulin retention benefits.

Differences

SpecConcentrateIsolate
Protein percent70 to 8090 plus
Lactose4 to 8 g per scoopunder 1 g
Fat2 to 5 gunder 1 g
CostLowerHigher

Dosing

20 to 40 g protein per serving for most adults engaged in resistance training.

Citations

FAQ

Educational, not medical. These statements have not been evaluated by the Food and Drug Administration. This content is for educational purposes only and is not a substitute for medical advice from a qualified healthcare provider. Not intended to diagnose, treat, cure, or prevent any disease.