Herbal Supplement. Promotes Regularity. Cascara Sagrada is an all-natual laxative designed for the relief of occasional constipation. Cascara Sagrada helps promote regularity and contains no harsh synthetics, so you can be assured of gentle, yet efficient, relief. We only use the finest quality herbs and spices. Each is screened and finely milled for quick release. Preservative-free gelatin capsules contain pure milled herb powder.