Prof. Dr. med. Andreas Michalsen, born in 1961 in Bad Waldsee as the son of a Kneipp physician, is an internist, nutritional medicine specialist, and fasting doctor. As a Professor of Clinical Naturopathy at Charité Berlin and Chief Physician of the Department of Internal Medicine and Naturopathy at Immanuel Hospital Berlin, he conducts research, teaches, and treats patients with a focus on nutritional medicine, therapeutic fasting, intermittent fasting, and mind-body medicine. Michalsen publishes and lectures internationally in the fields of naturopathy and complementary medicine.

His bestseller Healing Through the Power of Nature was published in 2017 by Insel. This was followed by Healing with Nutrition in 2019, The Nature Docs in 2022, Nutrition: My Quintessence in spring 2024, and the guidebook Fasting Mimicking Diet in 2025.

Since spring 2019, Prof. Michalsen has also been offering a multimedia online fasting course.

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