All Natural Fiber Supplement Promotes Regularity Fiber, Senna and Purifying Herbs Fiber Plus ® is Yerba Prima s most powerful formula to restore and promote regularity. It contains all the benefits of fiber, plus the additional colon cleansing benefits of senna, in a base of purifying herbs.* Use as needed, but not longer than two months everyday. For long term regularity, gradually substitute Yerba Prima Daily Fiber® of Colon Care for Fiber Plus®. *These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.