- Based on the Japanese principle of Kaizen, which means 'improvement' or 'small, permanent change for the better', the Zen Diet ensures you will never be 'on' another diet ever again - The Zen Diet combines ancient spiritual wisdom with the most cutting-edge research into fat loss - Includes dietary adjustments, supplementation and advice approved by the Institute of Food Research and clinically proven among other things to actually decrease the number of fat cells in your body - all without any calorie counting