Dr Jason Fung Wiki, Age, Wife, Children, Family, Biography & More

Dr Jason Fung

Dr Jason Fung is a Canadian functional medicine advocate, nephrologist (kidney specialist), and author. He runs a blog named The Fasting Method and a YouTube channel under the name Jason Fung.


Dr Jason Fung was born in 1973 (age 50 years; as of 2023) in Toronto, Canada. Dr Fung earned his medical degree from the University of Toronto, Faculty of Medicine. He then completed his residency in internal medicine at the University of Toronto, where he also undertook specialized training in nephrology. He has done a fellowship in nephrology at UCLA (University of California, Los Angeles). [1]Diet Doctor Dr Fung is a board-certified nephrologist, specializing in kidney disease and related conditions. Dr Fung is certified by the Royal College of Physicians and Surgeons of Canada in internal medicine and nephrology. He has also obtained certification from the American Board of Internal Medicine in both internal medicine and nephrology.

Physical Appearance

Height (approx.): 5′ 7″

Weight (approx.): 70 kg

Hair Colour: Black

Eye Colour: Black

Jason Fung


Parents & Siblings

There is not much information about his parents and siblings.

Dr Jason Fung with his parents

Dr Jason Fung with his parents

Wife & Children

Dr Fung’s wife’s name is Sandra Fung. They have two children together, two boys named Matthew and Jonathan Fung.

Jason Fung with his wife Sandra Fung

Jason Fung with his wife Sandra Fung

Jason Fung with his sons Matthew and Jonathan

Jason Fung with his sons Matthew and Jonathan


Nephrology & Functional Medicine

Dr Jason Fung is a nephrologist who is known to challenge conventional medical practices and advocate alternative health approaches. He has gained widespread recognition for his groundbreaking work in intermittent fasting, metabolic health, and low-carb diets. Dr Fung’s expertise lies in understanding the impact of insulin and blood sugar levels on overall health, particularly about obesity and type 2 diabetes. He firmly believes that lifestyle changes can effectively manage and reverse these conditions, reducing reliance on medications. Dr Fung engages with the public through speaking engagements, interviews, and online platforms. He has become a leading advocate for metabolic health, inspiring countless individuals to make informed and sustainable lifestyle choices. Dr Jason Fung’s pioneering work has significantly impacted the medical community and shifted perspectives on health and nutrition. In 2012, Dr Jason Fung and Megan Ramos founded the first-ever intermittent fasting clinic in North America following thorough scientific research. [2]doctorjasonfung.com He also contributes as an author for Diet Doctor, a site that focuses on weight loss and a low-carb lifestyle. [3]Diet Doctor Dr Jason Fung serves as the managing director of the nonprofit organization National Collaborating Centres for Public Health (NCCPH) in Canada., a global group focused on advocating for reliable nutritional information.

Blog & YouTube

Dr Jason Fung and Megan Ramos run a blog named The Fasting Method, where Dr Fung writes articles and posts medical vlogs. The focal points of most of his blogs are diets, weight loss, and fasting. Through the blog, Dr Fung explains the ‘science behind intermittent fasting’. [4]The Fasting Method The Fasting Method is also the name of a programme that he co-founded, which helps with weight loss and reversing Type-2 diabetes. He also runs a YouTube channel named Jason Fung, where he posts videos on the same subjects.

Dr Jason Fung with his YouTube Golden Play Button

Dr Jason Fung with his YouTube Golden Play Button


Dr Jason Fung has written the following books: “The Obesity Code: Unlocking the Secrets of Weight Loss” (2016), “The Complete Guide to Fasting: Heal Your Body Through Intermittent, Alternate-Day, and Extended Fasting” (2016), “The Diabetes Code: Prevent and Reverse Type 2 Diabetes Naturally” (2018), “The Longevity Solution: Rediscovering Centuries-Old Secrets to a Healthy, Long Life” (2019), “Life in the Fasting Lane: The Essential Guide to Making Intermittent Fasting Simple, Sustainable, and Enjoyable” (2020), and “The Cancer Code: A Revolutionary New Understanding of a Medical Mystery” (co-authored with Travis Christofferson) (2020). The most influential and well-discussed of these books are:

The Complete Guide to Fasting

“The Complete Guide to Fasting,” co-authored by Dr Jason Fung and Jimmy Moore in 2016, offers a comprehensive exploration of fasting as a health strategy. This book delves into the science, historical context, and practical aspects of fasting, presenting various fasting methods and their potential benefits for weight loss, metabolic health, and overall well-being. Dr Jason Fung, a nephrologist, and Jimmy Moore, a health podcaster, provide evidence-based insights, success stories, and practical advice to safely and effectively implement fasting. It serves as a valuable resource for those interested in understanding and embarking on a fasting journey to improve their health and wellness.

The Obesity Code

“The Obesity Code” (2016) is a book authored by Dr Jason Fung. Dr Fung challenges conventional beliefs surrounding obesity and provides a fresh perspective on weight loss and health. The book explores the underlying causes of obesity, such as insulin resistance and hormonal imbalances, and presents a compelling case against traditional calorie-focused diets. Introducing the concept of intermittent fasting, Dr Fung advocates for its effectiveness in weight management and overall health improvement. By offering evidence-based insights and practical advice, “The Obesity Code” urges readers to adopt informed lifestyle changes for sustained weight management and enhanced well-being. The book has sold over a million copies all over the world. [5]The Fasting Method

The Diabetes Code

“The Diabetes Code” (2018) is a groundbreaking book authored by Dr Jason Fung, where he addresses the rising prevalence of type 2 diabetes and challenges conventional treatment methods. He explores the fundamental causes of diabetes, emphasizing the impact of insulin resistance and the harmful effects of high-carb diets. Drawing from solid research and clinical experience, Dr Fung introduces an innovative approach to managing diabetes through intermittent fasting and dietary modifications. The book provides practical advice on breaking free from the cycle of elevated blood sugar levels and reliance on medications.

The Cancer Code

“The Cancer Code” (2020) challenges conventional beliefs about cancer, exploring the role of insulin and growth factors in its development and progression. Dr Fung advocates for a lifestyle that includes fasting and dietary changes to prevent and manage cancer. Drawing from research and clinical experience, the book offers a fresh perspective on understanding and combating cancer, emphasizing the importance of nutrition and metabolic health. “The Cancer Code” provides valuable insights into the link between diet, obesity, and cancer, presenting a revolutionary cancer prevention and treatment approach.

Dr Jason Fung posing with his book 'The Cancer Code'

Dr Jason Fung posing with his book ‘The Cancer Code’


  • Daily Mail has given Dr Jason Fung the title of “the doctor who invented intermittent fasting”. [6]Dr. Jason Fung
  • Dr Jason Fung has about 1.02 million YouTube subscribers as of 2023 for which he received a ‘Golden Play Button’ from YouTube.
  • Dr Fung has a store where he sells merchandise such as mugs, t-shirts and phone cases.
  • While millions of people buy Dr Fung’s books, critics and academics debunk his ‘expert opinion’ as dangerous and question his reluctance to debate those criticisms. [7]biolayne.com
  • Dr Fung has a pet rabbit.
  • Dr Fung enjoys outdoor activities like fishing and cycling.

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