Stopped taking the AREDS 2 vitamins and after at least 18 months it f misery I appear to be doing better. 3 weeks of formed stools. Amazing.
Several years back I was living in Saudi Arabia and had a similar experience. Happened to hear Dr Dean Adel on the radio saying that some people do not tolerate the glucosamine portion of the glucosamine and chondroitin portion of those arthritis supplements. Same results. Stopped taking it and my belly calmed down.