Margit Fensl is a nutritionist, academic kinesiologist, interval fasting trainer, qualified  consultant for intestinal issues and metabolic typing/metabolic type consultant in her own clinic.The self-employed nutritionist and author helps to achieve lasting success in the desire to lose weight and alleviate food intolerance with coordinated individual methods, nutrition tips according to traditional Chinese medicine, information on individual type-appropriate food and intermittent fasting. With her book series "Fountain of Youth Effect", she made the rejuvenating power of intermittent fasting palatable to her readership and stormed the bestseller lists. In her  bestseller "Die Jungbrunnen-Küche" (“Fountain of youth kitchen”)  she shows how one can live long and happily with the secrets of nature.