Buckthorn is a multi-stemmed deciduous shrub, that grows up to 7 meters tall. Buckthorn is collected in the summer, and then must be aged for a minimum of a year to break down its anthrone chemicals. Buckthorn contains 1,8-dihydroxy-anthracene derivatives (in the aged bark), flavonoids, and tannins. A few drops of buckthorn extract are known to add moisturizing properties to soap, lotion, and bath bombs. It is full of vitamins C and E, and ideal for sensitive or mature skin.