Our Team

Founder & CEO


Danny Bernstein

Danny has suffered from gastrointestinal (GI) disorders including Crohn’s disease and Irritable Bowel Syndrome (IBS) since his early teens. He was motivated to create change because of his experience in knowing how painful and disruptive IBS and IBD can be. His personal IBS/IBD experience and drive, together with his diverse background in architecture, children’s computer game design, management of consumer-oriented software projects, and entrepreneurship made him well qualified to lead a digital therapeutic company.

Chief Medical Advisor


Dr. Charlie Baum, MD, MS, FACG

Dr. Baum is a board-certified Gastroenterologist and Physician Nutrition Specialist with more than 30 years of experience in healthcare. He has led clinical and basic science research in academia, and held executive positions in the pharmaceutical industry and more recently digital health sector.  Dr. Baum was previously Chief Medical Officer at digital health start up SonarMD, after serving as Vice President of US and EU Medical and Scientific Affairs for 6 years at Takeda Pharmaceuticals International. Prior to that he was the Vice President of Health Affairs at Alexian Brothers Hospital Network (now Amita Health). Dr. Baum began his career as a clinical faculty member at the University of Chicago (15 years) and the University of Illinois at Chicago (6 years).


metaMe Health has assembled leaders in the field of GI health to advise us on scientific, clinical and business matters surrounding digital therapeutics, IBS and Brain-Gut Therapy.


Dr. John Pandolfino, MD

Dr. Pandolfino is the Chief of Gastroenterology and Hepatology in the Department of Medicine at Northwestern Medicine. He is also the Hans Popper Professor of Medicine. A major aim of Dr. Pandolfino’s current research focuses on improving diagnosis and management of GERD patients not responding to proton pump inhibitor (PPI) therapy. This group of patients represents a significant burden as up to 30-50% of all GERD patients are not satisfied with their response to PPI therapy. Additional information about Dr. Pandolfino can be found here.


Dr. Lin Chang, MD

Dr. Chang is Vice-Chief of the Division of Digestive Diseases, Program Director of the UCLA GI Fellowship Program, and Co-Director of the G. Oppenheimer Center for Neurobiology of Stress and Resilience (CNSR) and a Professor of Medicine at the David Geffen School of Medicine at UCLA.

Dr. Chang’s clinical expertise is in functional gastrointestinal disorders which include irritable bowel syndrome (IBS), chronic constipation and functional dyspepsia. Her research is focused on the pathophysiology of IBS related to stress, sex differences, genetic and epigenetic factors, neuroendocrine alterations, and gut microbiome and the treatment of IBS. You can learn more about Dr. Chang here.

Dr. Stephen Hanauer, MD

-Clifford Joseph Barborka Professor
-Professor of Medicine (Gastroenterology and Hepatology)
-Northwestern Medicine

Dr. Hanauer joined Northwestern Medicine in January 2014 as the Clifford Joseph Barborka Professor of Medicine and the medical director of the Digestive Disease Center. He serves as chair of the International Organization for Inflammatory Bowel Disease, secretary-elect of the American College of Gastroenterology, and is a member of the GI Specialty Board of Internal Medicine, the American College of Physicians, and American Gastroenterology Association.

Additional information about Dr. Hanauer can be found here.


Dr. Laurie Keefer, PhD

Dr. Keefer is a GI Health Psychologist and the Director of Psychobehavioral Research at the Ichan School of Medicine at Mount Sinai in New York City.  She has been a pioneer in the development of effective behavioral therapies for the full range of gastrointestinal disorders, including IBS, Crohn’s Disease, ulcerative colitis, reflux disease and other esophageal disorders.  Previously, she was Associate Professor at the Northwestern University Feinberg School of Medicine in Chicago, where she retains an Adjunct appointment. She is licensed in both Illinois and New York.


Dr. Olafur Palsson, PsyD

Dr. Palsson is a clinical psychologist and health researcher with a long-standing interest in the relationship between mind and body in the determination of health and illness. He is originally from Iceland. Dr. Palsson's current research interests include investigation of the psychological and physiological aspects of gastrointestinal disorders and symptoms, development of questionnaires to improve GI research, and the use of psychological treatments for IBS and other functional GI disorders.


Dr. Sarah Kinsinger, PhD

-Associate Professor of Medicine & Psychiatry
-Clinical Psychologist
-Board Certified Clinical Health -Psychology by the American Board of Professional Psychology
-Director, Behavioral Medicine for Digestive Health Program
-Division of Gastroenterology & Nutrition
-Loyola University Medical Center

Additional information about Dr. Kinsinger can be found here.


Dr. Darren Brenner, MD

-Associate Professor of Medicine (Gastroenterology and Hepatology) and Surgery
-Associate Professor of Surgery
-Northwestern Medicine

Additional information about Dr. Brenner can be found here.