I dont know about Citrucel, but watch out for Metamucil. I finally figured out the fake sugar in that stuff, especially the aspartame in the pink lemonade flavor, was doing me much more harm than good. Boy did I contact that company and chew them out! Imagine a company that promotes colon health using aspartame in their products. I now use plain psyllium whole husks from the health food store. Much better for my digestion. I don't use it all the time. I also like Chia Seed(really good because it is incredibly nutritous as well), and the Aqua Full from the Full Bar weight-loss system. The Aqua Full has splenda in it, so be careful. Many people are like me and can tolerate Splenda. I have found the key for me is if something works well, don't overdo it. Use it several times a week, but not every day. I am only talking about myself, not trying to say everyone should do this. I also have good luck with occasional use of magnesium.