I have just started lifting weights after a long break. I am in pretty good shape (Male 5ft 11in 175 lbs) and do a fair amount of cardio. I know the importance of a protein supplement before and after my lifting sessions, but the one I am taking makes me sick and ruins my workouts. I have the GNC brand whey protein. I mix it with a bottle of water and drink it starting about 30 minutes before I start lifting. I get really bad heartburn and sick to my stomach. I always do a cardio session after lifting to keep the heart rate up and metabolism primed, but have thrown up during my cardio after taking my protein. I have tried eating something like a banana or carrots to fill my stomach with something other than the protein, but it doesn't seem to help. A few years ago I took Myoplex for a few months and didn't have any problems. I spoke to my doctor about this during a physical and she said it is the introduction of so much protein into my stomach. She says the body releases a lot of acid when so much protein is introduced causing the upset stomach. I am putting this up for discussion. Any suggestions?