I eat pretty good but past few days I have ate at least one meal containing fat. I have had problems all my life with KaKa-ing (bowel movement) taking days sometimes over a week before I go, and only going because I took Dulcolax. When I heard Alli will help in this department, believe it or not I was so excited... BUT I have not had any side effects at all. Can someone tell me how many days Alli must be in your system before seeing any side effects?