I have had a problem these last few months. Each time after drinking my whey protein shake, I get diarrhea within 4-6 hours. Like I said, I've had his problem since end of October. When I don't drink my protein shake I'm fine. I have never been lactose intolerant in the past, but then again, I don't like milk so haven't drank much. Do you have anything on this? And if this is the case, do I have any options for an alternate protein supplement? Thanks for your help!