Herbal Supplement. Rainbow Light® ~ Herbal Prescriptives. For Liver Support. Antioxidant Protection. Milk Thistle & Artichoke. Herbal IQ™ Guarantee. Comprehensive Liver Support 1,500 mg of liver-supporting milk thistle, the detoxifying herbs artichoke, bupleurum, and schisandra, plus antioxidant protection from mixed carotenoids.*. Herbal IQ™ Guarantee Our comprehensive Herbal IQ Guarantee program ensures thorough review by qualified herbalists of selected herbs and combinatio.