Chaparral (Larrea Tridentata) is famous for its primary constituent NDGA (nordihydroquaiaretic acid) which has pronounced antioxidant and anti-cancer effects. Chaparral sedates inflammation, has vasodepressant properties and has been found to increase ascorbic acid levels in the adrenals. It also helps relieve pain of neuritis, sciatica, and has anti-bacterial properties with added vit C and Zinc."Chaparral w/Vitamin C-Zinc-Yucca 500mg" has been proven to be effective on your health system. For more information about Arizona Natural 's Chaparral w/Vitamin C-Zinc-Yucca 500mg please read "Supplement Fact" below provided by the manufacturer.