DESC: Jarrow Formulas? Yucca 4:1 Extract contains the dried pure juice of the yucca plant and contains more saponins than dried stalks. (Note the yellow coloring.) Saponins are classified as glycosides, and are usually found in the root or juice extracts. Traditionally, Native Americans used the juice of the yucca plant to improve joint health. Jarrow Formulas Yucca Extract 500mg 100C