@guybe

There are some studies that actually show benefit of using whey protein as it possibly suppresses cancer growth , inclooding the prostate one. It seems that casein is the part of milk that induces prostate cell growth (in vitro experiments). So anybody still enjoying cheese consumption should perhaps reconsider. ; )

So, the bottom line is that whey should be OK and at the same time for those that try to stay vegan there is a TON of vegetable based protein shakes - soy, beans, peas, etc. All very tasty at that .

My husband alternates between whey and soy protein shakes and actually when he uses whey he mixes it in soymilk.

PS: using ORGANIC and non GMO or grass fed protein shake is highly recommended. Also try to avoid ones that have added artificial sweeteners, sugar, artificial color and a lot of emulsifiers.