Dr. David Wiss, PhD, RDN, IFMCP

Dr. David Wiss is a pioneering mental health nutritionist who bridges the gap between nutritional science and psychiatric care. As an Institute of Functional Medicine Certified Practitioner (IFMCP), he applies systems biology to uncover root causes of mental health challenges through comprehensive root cause analysis.

With over 13 years of clinical experience, Dr. Wiss founded Nutrition in Recovery. This Los Angeles-based group practice has transformed mental health treatment by integrating cutting-edge personalized nutrition protocols into substance use disorder and eating disorder care. His innovative Wise Mind Nutrition app extends this integrated approach to thousands, making evidence-based nutritional mental health support more accessible.

As a researcher and thought leader, Dr. Wiss has authored over 20 peer-reviewed publications examining the complex relationships between ultra-processed food addiction, eating disorders, and mental health outcomes. His work challenges traditional approaches, advocating instead for nuanced, individualized care that honors both biological reality and psychological complexity. His commitment stems from witnessing firsthand how medicinal plants can restore hope when traditional treatments fall short.

A sought-after speaker and media expert, Dr. Wiss regularly translates complex nutritional science for mainstream audiences, whose work has been cited in National Geographic, The New York Times, and The Washington Post. He is dedicated to transforming mental healthcare by advancing the integration of nutritional psychiatry into standard practice, addressing systemic barriers to nutrition services, and elevating awareness of how commercial food environments impact mental health. Through his clinical work, research, and advocacy, he continues to pioneer approaches that treat the whole person—not just symptoms—while training the next generation of integrative mental health practitioners.