Materia Medica

Frangula purshiana (Cascara Sagrada), realistic botanical photo
Cascara Sagrada (Frangula purshiana) — Sacred Bark, California Buckthorn
A safety-forward guide to Cascara Sagrada (Frangula purshiana), including bark identification, traditional stimulant-laxative use, FDA OTC status, anthranoid risks, cultivation and folklore. Read more...