I am currently 3 days into the TS plan and have not had any side effects apart from upset tummy. I am not experiencing hunger problems, headaches or tiredness as such but I find that after i drink the shakes i get diarrhea. Im ok after eating the bars, and seem ok after the soup, but every time i have the shakes, roughly an hour later i feel my tummy gurgle where i get to urge to go toilet, is it quite normal to get the runs when yr doing TS ???