China Green Dieter Brand is blended with the premium natural herbs. The formula and preparation are based on an old Chinese book of medicine, Detailed Outlines on Chinese Herbs, by Lee Se-Zhen, 1518-1593. After centuries of use, it has proven to be one of the best healthy beverages for dieters. Free Of Caffeine and chemical additives. Disclaimer These statements have not been evaluated by the FDA. These products are not intended to diagnose, treat, cure, or prevent any disease.