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What's the difference? I'm looking at shake options and some contain whey isolate, some contain whey concentrate and some both.

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up vote 18 down vote accepted

The main difference is in the "purity", how much lactose and fat is left with the protein after filtering. Whey isolate usually contains around 90% protein and whey concentrate is more like 70-85%.

If you have trouble digesting the lactose or are trying to minimize carbohydrate content, then whey isolate would be a good choice. Otherwise, it probably doesn't matter; just pick the concentrate since it's cheaper in terms of protein grams/dollar.

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Thanks, that's useful info – RichK Mar 1 '11 at 20:06
    
+1 for a balanced argument – Anonymous Type Mar 11 '11 at 12:43

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