Cascara sagrada comes from a species of buckthorn that is distributed
throughout the American Pacific Northwest and British Columbia. Native
Americans of the region, who called the herb sacred bark, prepared the
aged bark as a tea to ease constipation. By the mid-19th century, a
pharmaceutical company began producing cascara-based
agents for export to Europe.
Today, cascara sagrada is primarily valued for its role in traditional herbal systems and for its significance as a classic botanical ingredient. As with many traditional herbs, it is best approached with care and used in accordance with applicable guidelines and professional advice.