I have been taking Threelac for almost a week now & I can tell you I am feeling better. So far this is the ONLY thing that has helped with my dandruff & itches! As far as Sugar goes the ingredients do not list sugar. I know that some people have not had success with Threelac but some have. Everyone is different and different things work for different people. I am personally glad I tried Threelac and I am hoping for continued results. If not, I will try something else. You have to keep trying to get what is right for you!