Naresh Gunaratnam, M.D., is a distinguished gastroenterologist and healthcare executive with over 20 years of experience in both clinical practice and medical innovation. Board certified in Gastroenterology, Dr. Gunaratnam has earned widespread recognition for his contributions to the field, including the American Gastrointestinal Association’s 2019 Distinguished Clinician Award. He currently serves as the President of the Digestive Health Physician Association (DHPA) and has been a key leader in organizations such as the Michigan GI Society, where he served as President from 2013 to 2020.

Dr. Gunaratnam has held significant leadership positions, including President and CEO of Huron Gastroenterology (2020-2022) and Director of Interventional GI at Trinity Health from 2018 to 2020. Beyond his clinical expertise, he is a visionary entrepreneur, co-founding innovative healthcare startups like NovoLiver, Lean Medical, and Huron Med, which focus on transforming GI care.

An active leader in clinical research, Dr. Gunaratnam has published over 70 peer-reviewed articles and contributed to multiple book chapters in the field of interventional gastroenterology. He is also an Adjunct Clinical Instructor at the University of Michigan Medical School and Ross School of Business, where he mentors the next generation of healthcare professionals.

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Dr. Partha S. Nandi, MD, FACP, is board-certified in Gastroenterology and Internal Medicine by the American Board of Internal Medicine. He currently serves as the Chief Medical Officer of Pinnacle GI Partners. He earned his undergraduate degree summa cum laude from Ohio State University and his medical degree with distinction from Wayne State University, where he also completed his Internal Medicine residency. Dr. Nandi pursued a three-year Gastroenterology fellowship at the University of Michigan. He specializes in therapeutic endoscopy and endoscopic ultrasound and has authored several peer-reviewed publications. As an educator, he lectures on gastroenterology and hepatology topics. Dr. Nandi performs all diagnostic and therapeutic endoscopic procedures and is a member of several professional organizations, including the American Medical Association and the American College of Gastroenterology. He also serves as a Clinical Associate Professor at Michigan State University and is the author of Heal Your Gut, Save Your Brain and The Ask Dr. Nandi Plan.

Dr. Robert Hirten, MD is an Associate Professor of Medicine & Artificial Intelligence and Human Health at the Icahn School of Medicine and residing IBD attending at Mount Sinai. He also serves as the Clinical Director of the Hasso Plattner Institute for Digital Health (HPI.MS) and the Director of the Digital Discovery Program at Mount Sinai.

He completed his residency at the Albert Einstein College of Medicine and gastroenterology fellowship at Northwell Health. He subsequently received specialized training in the care of patients with complex inflammatory bowel disease as The Daniel and Jane Present-Andrew Levison Advanced Inflammatory Bowel Disease (IBD) Fellow at Mount Sinai. He is currently the Associate Fellowship Director for the Advanced IBD Fellowship at Mount Sinai, the site director for the Crohn's & and Colitis Foundation National Visiting IBD Fellowship, as well as the VP of the New York Crohn's & and Colitis Organization. He has served as a member on multiple national committees in the American College of Gastroenterology, and American Gastroenterological Association, as well as on the National Steering Committee for the MILESTONE Initiative, which leads a national education curriculum for Advanced IBD Fellows.

Dr. Hirten’s research focuses on the use of connected devices and digital technology for the study of health and disease. Leveraging this technology, he leads wearable device studies across patient populations and disease states. His work has resulted in the development of novel machine learning algorithms derived from wearable devices for the prediction of various health and disease endpoints and has been featured by news outlets including USA Today, CBS News, and Forbes.

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Mark Pimentel, MD, is an Associate Professor of Medicine and of Gastroenterology at Cedars-Sinai. Dr. Pimentel is also the Executive Director of the Medically Associated Science and Technology (MAST) program at Cedars-Sinai, a collective of physicians and researchers dedicated to the study of the gut microbiome in order to develop effective diagnostic tools and therapies to improve patient care. Dr. Pimentel is also a Professor of Medicine at the Geffen School of Medicine, University of California, Los Angeles (UCLA.)

As a physician and researcher, Dr. Pimentel has served as a principal investigator or co-investigator for numerous  translational and clinical investigations of irritable bowel syndrome (IBS). This research led to the first ever blood tests for IBS, ibs-smartTM, the only licensed and patented serologic diagnostic for irritable bowel syndrome. The test measures the levels of two validated IBS biomarkers, anti-CdtB and anti-vinculin.

A pioneering expert in IBS, Dr. Pimentel’s work has been published in the New England Journal of Medicine, Annals of Internal Medicine, American Journal of Physiology, American Journal of Medicine, American Journal of Gastroenterology and Digestive Diseases and Sciences, among others. Dr. Pimentel has presented at national and international medical conferences and advisory boards. He is a diplomate of the American Board of Internal Medicine (Gastroenterology), a fellow of the Royal College of Physicians and Surgeons of Canada and a member of the American Gastroenterological Association, the American College of Gastroenterology, and the American Neurogastroenterology and Motility Society.

Dr. Peter H. R. Green is the Director of The Celiac Disease Center at Columbia University, a Professor of Clinical Medicine at the College of Physicians and Surgeons at Columbia University, and an Attending Physician at the New York-Presbyterian Hospital. He is one of the few physicians in the United States today with an intense clinical and academic interest and expertise in Celiac Disease. As a result of the need for a coordinated approach for the medical care of patients with Celiac Disease, Dr. Green established the Celiac Disease Center at Columbia University in 2001 and is the author of the book Celiac Disease: A Hidden Epidemic. The Center now includes adult and pediatric gastroenterologists, dieticians, research coordinators; and has active research collaborations worldwide to study the epidemiology, clinical manifestations, and pathophysiological mechanisms of celiac disease. Apart from his book, Green's additional literary accomplishments include co-authoring more than 100 peer-reviewed publications on the topic of Celiac Disease, including epidemiological investigations, studies of associated diseases, pathophysiology, and clinical trials of non-dietary drug therapy.

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Dr. Frank Gress is a professor of medicine in the Division of Gastroenterology at the Icahn School of Medicine at Mount Sinai and The Mount Sinai Hospital. He also serves as Chief of the Division of Gastroenterology & Hepatology at Mount Sinai South Nassau and is the Medical Director of the Center for Interventional Endoscopy at Mount Sinai South Nassau. Dr. Gress is an active researcher with a focus on endoscopic ultrasound (EUS) and interventional endoscopy, and he has published numerous articles and co-authored several textbooks in these areas. He is also a Fellow of several professional organizations and has served in leadership roles/committees within them. Additionally, he regularly presents at national and international conferences and serves as a reviewer for leading journals in gastroenterology and gastrointestinal endoscopy.

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Emeran Mayer, MD, is a gastroenterologist, neuroscientist, and the author of The Mind-Gut Connection and The Gut Immune Connection. He is the executive director of the G. Oppenheimer Center for Neurobiology of Stress and Resilience at UCLA and the founding director of the UCLA Microbiome Center.

Dr. Mayer has a career long interest in clinical and research aspects of brain gut disorders, including IBS for the past forty years, with longstanding support of his research by the NIH. His current research efforts focus on the role of brain gut microbiome interactions in a wide range of disorders, including inflammatory and functional GI disorders, Alzheimer’s and Parkinson’s disease, and autism spectrum disorders.

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Megan Oser, PhD is a licensed clinical psychologist with 15 years of experience in behavioral medicine and treatment development. Dr. Oser held leadership roles within Harvard Medical School and digital health technology start-up and growth stage companies where she led the clinical and scientific strategy.  Across industry and academic medical settings, Dr. Oser optimized care by integrating psychological services  with medical care, and using evidence-based therapies to improve digital health programs.

Dr. Oser is the former Director of CBT and Behavioral Medicine at Brigham and Women’s Hospital where she established  cognitive behavioral therapy clinical services and research across several specialty medical care departments (GI/hepatology, cardiac arrhythmia clinic, transplant, neurology, and infectious disease).

Dr. Oser has published over 30 peer-reviewed articles and abstracts. Her work has been published in the American Journal of Gastroenterology, Neurogastroenterolgy & Motility,Journal of Infectious Diseases, Journal of Pain, Journal of Medical Internet Research, Telemedicine and e-Health, and Annals of Behavioral Medicine, among others. Dr. Oser earned her PhD in clinical psychology at University of Nevada, Reno and completed her clinical training and research fellowship at VA Palo Alto Health Care System and Stanford University School of Medicine.

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Laura Reigada, Ph.D., is a licensed clinical health psychologist, an Associate Professor of Psychology at Brooklyn College, and doctoral faculty in the Health Psychology and Clinical Science program at the City University of New York. Dr. Reigada earned her PhD in Clinical and School Psychology at Hofstra University, and followed it with a two-year NIMH postdoctoral clinical research fellowship at the Institute for Anxiety and Mood Disorders, at the NYU Child Study Center, within the NYU School of Medicine. Dr. Reigada is co-chair of the ROME Foundation’s Psychogastroenterology Membership Committee.

The goal of her clinical practice and research is to improve the psychosocial care of patients with chronic digestive conditions using psychological science and multidisciplinary treatments. She specializes in cognitive-behavioral approaches, gastrointestinal disorders, and anxiety-related disorders.

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Dr. Mark Hyman is a practicing family physician and an internationally recognized leader, speaker, educator, and advocate in the field of Functional Medicine. He is the founder and director of The UltraWellness Center, Senior Advisor for the Cleveland Clinic Center for Functional Medicine, a fourteen-time New York Times best-selling author, and Board President for Clinical Affairs for The Institute for Functional Medicine. He is the host of one of the leading health podcasts, The Doctor’s Farmacy. Dr. Hyman is a regular medical contributor to several television shows and networks, including CBS This Morning, Today, Good Morning America, The View, and CNN.

Recognized as a pioneer of integrative and functional medicine (or what he calls “good medicine”), Dr. Frank Lipman is the founder of the Eleven Eleven Wellness Center and Chief Medical Officer at The Well, both in NYC.

As a physician for over 40 years, his mission has been to provide his patients with access to every tool possible to optimize their health. He uses sophisticated genetic testing, comprehensive blood testing of biomarkers (many not done in a routine check-up), information from wearables when indicated, and his vast clinical experience when providing personalized care.

He is also a NY Times bestselling author, having written seven books on health, including The New Rules of Aging Well, How to Be Well, The New Health Rules and Better Sleep, Better You.

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Chris Kresser M.S., L.Ac is the founder of Kresser Institute, the creator of ChrisKresser.com, and the New York Times best selling author of The Paleo Cure and Unconventional Medicine. He is one of the most respected clinicians and educators in the fields of functional medicine and ancestral health, and has trained over 1,500 practitioners and health coaches around the world in his unique approach. Chris was named one of the 100 most influential people in health and fitness by Greatist.com in 2012, and his blog is one of the top-ranked natural health websites in the world. Chris lives in Utah with his wife and daughter.  

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