Devil's Claw 4 oz by Herb PharmWe prepare our Devil's Claw Extract from the tubers of Harpagophytum procumbens plants which are Naturally Grown in their native habitat of Southern Africa's Kalahari region. To assure optimal extraction of Devil's Claw's bioactive compounds, we harvest and extract only the secondary storage tubers, and not the primary central root. These statements have not been evaluated by the Food and Drug Administration (FDA). These products are not meant to