Cascara, also known as cascara sagrada, bitter bark, cascara buckthorn, cascararinde and chittem bark, is a small tree or shrub that can be found growing North American locations.
Cascara sagrada bark contains chemicals called anthraquinones, which provide its color and also its laxative effects. Cascara sagrada weight loss claims are easily found around the internet, but this is neither a recommended nor safe use of the herb.