It is well known issue that protein powders can cause constipation, not with everyone of course. I had the same problem as you and that caused me hemorrhoids for a short brief of time so i've visited my doctor and he told me to cut off the shakes and add fiber to each of my meals in the diet. such as salads, oat meals, use brown rice instead of white, because white rice causes constipation., considering as athletes we consume it a lot for daily carb intake. dont eat banana, or artificial apple juice. Add more water to ur diet. add 1 spoon of olive oil to your salad, olive oil will help your intestines to wark faster and soak water into it. If you can find eat 8-12 dry apricot per day, it is very good for ur stomach and digestive system. and the most important thing is having a scheduled meal program, since you can't expect proper moves from ur digestive system if u don't have proper eating plan. take care
