From the Manufacturer:
Casgara Sagrada is an all-natural laxative designed for the relief of occasional constipation. It helps to promote regularity and contains no harsh synthetics, so you can be assured of gentle, yet efficient, relief. One capsule provides 450 mg of Cascara Sagrada. Capsules may be opened and prepared as a tea, or dispersed in any liquid desired. These preservative-free gelatin capsules contain pure milled herb powder.