Hi I have lived with IBS-D for about 10 yr the past 3 have been the worst I think diet wise, You have to learn what upsets you, etc. I'm also on a diet plan to lose also now, though weight watchers. I think the important thing is No caffeine, be careful of milk products, also make sure you dont get to much calcium that can make things worst. Hope I helped alittle bit I'm new at learning more about IBS because I'm so tired of living in pain. Good luck and best wishes, Mary
