Meet STEWART LONKY, MD
Stewart Lonky, MD, has spent over four decades in medicine, and for most of that time, one question kept following him: why do we actually gain weight? Not the textbook answer, the real one. That question eventually led him somewhere most doctors don’t go: into the environment itself, into the toxins we breathe and absorb every day, and how they quietly shape our bodies long before diet or willpower ever enter the picture.
He’s a double board-certified physician in internal medicine and pulmonology, with a subspecialty in critical care, and a medical toxicologist by training. In 2024 he published Outsmarting Obesity: A Doctor Reveals Why We Gain Weight, Why It Matters, and What We Can Do About It, a book that challenges the old “eat less, move more” model and replaces it with something more honest: a science-backed look at epigenetics, environmental exposure, and the everyday habits that quietly add up.
The Book
The book has found an audience well beyond his own patients. It’s been featured on ABC News, CNBC, the Hallmark Channel, and in HuffPost, and Kirkus Reviews called it “an invaluably knowledgeable attempt to reset thinking on obesity and weight loss.” It was also named a finalist for the ANDY Award, chosen from thousands of entries honoring excellence in nonfiction collaboration, and it won the International Impact Book Award in the Health and Wellness category. It’s now a finalist for the IIBA Book of the Year Award as well.
At the center of the book is AIPE: Accept, Identify, Prevent, Eliminate. It’s the framework Dr. Lonky built to help readers actually do something with the science, not just understand it.
How He Got Here
His path to this work started early. He earned his medical degree at SUNY Downstate Medical Center, trained at UC San Diego Health, and completed a fellowship in pulmonary disease and biochemistry through the National Institutes of Health. Somewhere along the way, he also picked up an MBA from Pepperdine. He’s a Diplomate of the American Boards of Internal Medicine, Pulmonary Disease, and Critical Care Medicine, and a Fellow of the American College of Physicians.
He’s the founder and former medical director of West Coast Cardiopulmonary, and he’s held academic posts at UC San Diego along with clinical leadership roles across Los Angeles hospitals. Early in his career, he published the first peer-reviewed research on using activated natural zeolite to help the body clear toxic metals, work that’s still cited today. He also co-founded Trylon Corporation, where his team developed cancer detection technologies that dentists and gynecologists around the world still rely on.
Beyond the Clinic
When he’s not working, he splits his time between Los Angeles and Santa Barbara with his wife, Marilyn. Between them they have two daughters and four grandchildren, which might be the one part of his life that has nothing to do with obesity research and everything to do with why he does it.
Personal
None of this happened in isolation. Dr. Lonky has spent years lecturing on environmental toxins and health across the U.S., Canada, and Australia, including a keynote at the Cancer Control Society’s Annual Convention. He is co-author of the forthcoming book Outsmarting Our Toxic Environment, the second installment in the Outsmarting series, with his friend and colleague, biochemist Rik J. Deitsch. He still writes and speaks internationally, translating research for audiences that range from fellow physicians to people just trying to understand their own bodies a little better.