Ethan J. Weiss, M.D.

Co-Founder, Medical Director

Dr. Ethan J. Weiss has been passionate about health since a young child, growing up around a cardiologist father. He eventually went on to attend Vassar College before moving on to medical school and residency at John Hopkins. He came to UCSF in 1998 to complete his clinical and research fellowships in cardiology and has remained on the faculty since then. Dr. Weiss has maintained an active clinical practice with expertise in the emerging intersection between endocrine and metabolic disease and cardiovascular diseases. He is a leading authority on novel tools to predict and prevent cardiovascular disease and has special interest in using technology as a tool to enable lifestyle changes.


Dr. Weiss maintains an active research program that focuses broadly on regulation of metabolism. His lab spans from basic biology exploring how hormones interact to regulate metabolic processes all the way to running randomized clinical trials to assess the impact of nutritional interventions. Throughout his 20 year career, Dr. Weiss has published papers in the best scientific journals including the New England Journal of Medicine, Nature, Journal of Clinical Investigation, and many others. He maintains robust grant support and has had funding from The NIH, AHA, ASH, as well as private foundations and other organizations. Recently, he has made it his life’s work to help the world live healthier through a combination of mindful living, exercise, and healthy eating. As the Co-Founder and Medical Advisor for Keyto, Dr. Weiss has been at the forefront of helping to make sure that Keyto’s proprietary technology lives up to Keyto’s personal health promise.

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