I too get very constipated .. i have to be reallly careful that I take the psyllium husk powder in water twice a day. I also take salmon oil which has helped and of course water. But use Senna if your in the beginning stages of atkins or if your really desperate. Senna is a laxative and can cause a depedency so u don't want to use it often. Take the husks with lots of water and get excercise. Also try to stay away from cheese, deli meat, and too much packaged stuff. All tend to be constipating. EAT FLAX, and make sure u get enough FAT. Hope it helps

Piera