Including more fiber in your diet can help you to control your IBS symptoms. Extra fiber from plant foods or fiber products can make your stools soft but firm -- and more comfortable to pass. If you have loose, watery stools from IBS, for example, fiber can firm them and "slow you down." If you have constipation, fiber can soften your stools and "speed you up." Citrucel's SmartFiber is proven to help restore and maintain regularity and it's the only fiber that won't ferment to cause excess gas.