Uncle Lee's Body Slim series of Dieter Tea are blended with premium natural herbs and spices. The formula and preparation are based on an old Chinese book of medicine--"Detailed Outlines of Chinese Herbs", by Lee Se-Zhen, 1518-1593. After centuries of use, this formula has been proven to be one of the best healthy beverages for dieters. Besides from being caffeine free, this tea is in its most original flavor of the spices and herbs -- making it the perfect choice for adding to a caffeine-sensitive person's diet. As our customers testify, these teas do not cause cramping. As with all natural laxatives, you should combine the taking these teas with the healthy addition of fresh fruits and vegetables and natural forms of fiber for good health.