As a true detective at heart, Petra integrates the most current scientific understanding of metabolism into her personalized approach to preventing and reversing disease.

Dr. Petra is a naturopathic doctor certified in nutrition and functional medicine. She primarily practices Deutenomic medicine, which is the science of water movement in a body. She was born and raised in the Netherlands and moved to New York in her 20s. She has spent the last nine years in California where she graduated from Bastyr University in 2016. After four years of seeing patients in Santa Monica, she currently only consults patients via telemedicine. Since the first of January 2021, her credentials have also been recognized and certified in Hungary, which extends to most other European countries.

She is known for her in-depth research and detailed follow through on each and every one of her patients. Her passion for seeking truth guides her to understand how we can do better in restoring patients’ health.

Learn about my approach and what to expect from a naturopathic doctor who practices deutenomic and functional medicine here.


In 2017, Dr. Petra completed the Dale Bredesen’s ReCODE program, Reversing Cognitive Decline Advanced Clinical Training by the Institute for Functional Medicine (IFM), now offered and managed by Apollo Health.

In 2019, she successfully completed the Root Cause Protocol Practitioner training.

In 2020 she became a Terrain Based Treatment™ Certified Practitioner and completed the Mistletoe Therapy & Integrative Oncology Course 2020 organized by the Physicians’ Association for Anthroposophic Medicine (PAAM)


Petra has professional memberships with the following: Institute of Functional Medicine, Root Cause Protocol, Oncology Association of Naturopathic Physicians, American College of Nutrition, and Dr. Nasha.


Reviewer for Scientific Reports, a Nature Research Journal –– invited July 2019


Petra is a long-time passionate cook. In 2020, her daughter, Sophia, self-published a cookbook, P’s Cookbook. The book contains forty-six meals and dishes Petra made and recorded while Sophia was growing up. Copies are available for sale on


Website and additional branding by Sophia Dorfsman


Petra Davelaar

© 2021