Dr. Jason Fung
About Dr. Jason Fung
Speaking videos
Books by Dr. Jason Fung
“The Hunger Code: Resetting Your Body's Fat Thermostat in the Age of Ultra-Processed Food” (2026)
The Hunger Code: Resetting Your Body's Fat Thermostat in the Age of Ultra-Processed Food
“The Cancer Code: A Revolutionary New Understanding of a Medical Mystery (The Wellness Code)” (2020)
Our understanding of cancer is slowly undergoing a revolution, allowing for the development of more effective treatments. For the first time ever, the death rate from cancer is showing a steady decline . . . but the “War on Cancer” has hardly been won. In The Cancer Code, Dr. Jason Fung offers a revolutionary new understanding of this invasive, often fatal disease—what it is, how it manifests, and why it is so challenging to treat. In this rousing narrative, Dr. Fung identifies the medical community’s many missteps in cancer research—in particular, its focus on genetics, or what he terms the “seed” of cancer, at the expense of examining the “soil,” or the conditions under which cancer flourishes. Dr. Fung—whose groundbreaking work in the treatment of obesity and diabetes has won him international acclaim—suggests that the primary disease pathway of cancer is caused by the dysregulation of insulin. In fact, obesity and type 2 diabetes significantly increase an individual’s risk of cancer. In this accessible read, Dr. Fung provides a new paradigm for dealing with cancer, with recommendations for what we can do to create a hostile soil for this dangerous seed. One such strategy is intermittent fasting, which reduces blood glucose, lowering insulin levels. Another, eliminating intake of insulin-stimulating foods, such as sugar and refined carbohydrates. For hundreds of years, cancer has been portrayed as a foreign invader we’ve been powerless to stop. By reshaping our view of cancer as an internal uprising of our own healthy cells, we can begin to take back control. The seed of cancer may exist in all of us, but the power to change the soil is in our hands.
“Life in the Fasting Lane: How to Make Intermittent Fasting a Lifestyle―and Reap the Benefits of Weight Loss and Better Health” (2020)
In Life in the Fasting Lane, Dr. Fung, Ramos, and Mayer take the reader by the hand and walk them through the basics of a fasting lifestyle—from the science behind fasting as a health and weight loss strategy to the real-life choices and dilemmas people commonly encounter. While Dr. Fung and Ramos explain the fundamentals of fasting and offer a customizable approach, Mayer shares her in-the-trenches perspective and hard-won knowledge as a success story who turned her life around with fasting. With chapters that address everything from meal planning to mental strategies; exercise to socializing, Life in the Fasting Lane is a unique and accessible guide to developing a sustainable and beneficial fasting routine that offers dramatic, lifelong results.
“The Diabetes Code: Prevent and Reverse Type 2 Diabetes Naturally (The Wellness Code Book Two)” (2018)
Everything you believe about treating type 2 diabetes is wrong. Today, most doctors, dietitians, and even diabetes specialists consider type 2 diabetes to be a chronic and progressive disease—a life sentence with no possibility of parole. But the truth, as Dr. Fung reveals in this groundbreaking book, is that type 2 diabetes is reversible. Writing with clear, persuasive language, Dr. Fung explains why conventional treatments that rely on insulin or other blood-glucose-lowering drugs can actually exacerbate the problem, leading to significant weight gain and even heart disease. The only way to treat type 2 diabetes effectively, he argues, is proper dieting and intermittent fasting—not medication.
“The Obesity Code” (2016)
In this highly readable book, Dr. Jason Fung, long considered the founder of intermittent fasting, sets out an original theory of obesity and weight gain. He reveals that everything you've been told about how to lose weight is wrong: weight gain is driven by hormones, and only by understanding the effects of insulin and insulin resistance can we achieve lasting weight loss. Dr. Fung shares five basic steps to controlling your insulin for better health. And he explains how to use intermittent fasting to break the cycle of insulin resistance and reach a healthy weight—permanently.
At a glanceDr. Jason Fung
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