Petra Bracht is a general practitioner and specialist in natural healing-in particular, nutritional medicine-and the author of many bestselling books. She heads the first private vegan health center in Bad Homburg, Germany. Over the past thirty years, she has observed how even people with very severe diseases have been able to heal themselves through intermittent fasting and a plant-based diet. Her goal is that everyone become aware of how much they can do proactively to prevent disease and live a healthy life. She lives in Bad Homburg, Germany.

Mira Flatt is a recipe developer who has worked intensively with Petra Bracht for the past eight years. She is a longtime vegan and has practiced intermittent fasting herself for the past six years. She lives in Bad Homburg, Germany.