"Cascara Sagrada, possessing numerous health benefits, is a prolific shrub native to the northwest United States. Nature's Plus Herbal Actives Cascara Sagrada bark extract is uniformly standardized to a minimum of 25-30% (25-30 mg) hydroxyanthracene derivatives of which 80% (20 mg) is cascaroside, to guarantee that each and every capsule provides consistent potency and activity. Each capsule, providing the greatest concentration of active botanical principles, maximizes the synergistic benefits of the whole bark which has been used by traditional health practitioners for decades. "