> It's hard now (since the FDA's anticascara action) to find a standardized aged [[cascara]] product, but Western Botanical and (in Italy) Farmalabor are two sources that I know of. (Naturlich Kost Ko-op in Millersburg, Ohio, has [[cascara]], but I think FDA is currently preventing them from doing business.) The Chinese rhubarb products are probably standardized, but I have never used them. An amount slightly less than a laxative dose has beneficial systemic effects.