Citrucel with SmartFiber is smart fiber therapy that's been specifically designed to be less harsh on your system. It helps you get the fiber you need to be more regular - without the fiber effects you don't want. And only Citrucel has SmartFiber.

The SmartFiber we use comes from cellulose, which occurs naturally in plants and is the most abundant, renewable fiber on earth. But we improved this natural fiber so that Citrucel with SmartFiber can promote regularity without causing bloating, gas and other side effects of other fiber products.