Dr. Jason Fung, MD


Dr. Jason Fung is a Canadian nephrologist. He’s a world-leading expert on intermittent fasting and low carb, especially for treating people with type 2 diabetes. He has written and he co-founded the Intensive Dietary Management program.

Dr. Fung has his own website at IDMprogram.com.

Dr. Fung graduated from the University of Toronto and completed his residency at the University of California, Los Angeles. He lives and works in Toronto, Canada.

Dr. Fung works with Team Diet Doctor. Together we want to make it simple for people to understand and implement intermittent fasting, to improve their health. Below is some of the material with Dr. Fung on Diet Doctor.

About Dr. Fung

Watch Dr. Fung’s brief presentation above.


Written profile

Dr. Jason Fung: Dismantling diet dogma, one puzzle piece at a time


The fasting video course


The type 2 diabetes video course



  • The perfect treatment for diabetes and weight loss
  • What to do instead of counting calories
  • Do you have to count calories to lose weight?
  • Are all carbohydrates equally bad?



  • Understanding and treating type 2 diabetes – Dr. Jason Fung
  • Therapeutic fasting
  • The cause of obesity
  • The 2 big lies of type 2 diabetes
  • The key to obesity
  • A new paradigm for type 2 diabetes




  • Intermittent fasting for beginners
  • Intermittent fasting – questions & answers


Q & A

Ask Dr. Jason Fung


More with Dr. Fung

Dr. Fung is also on Twitter, Facebook, Instagram, LinkedIn and YouTube.


The Obesity CodeThe Complete Guide to Fastingthe-diabetes-code (1)

Dr. Fung’s books The Obesity Code, The Complete Guide to Fasting and The Diabetes Code are available on Amazon.

Other publications

BMJ Case Reports 2018: Therapeutic use of intermittent fasting for people with type 2 diabetes as an alternative to insulin


Nutrition and your doctor
Announcing the Low Carb MD Podcast
Does fasting burn muscle?
PCOS, anovulatory cycles and hyperinsulinemia – PCOS 9
PCOS and hyperinsulinemia – PCOS 8
Could you fast for health without weight loss?
My single best weight-loss tip
With one foot in the grave, Robert turned things around and lost 200 lbs
PCOS and hyperandrogenism – PCOS 7
PCOS and associated conditions – PCOS 6
Are there any dangers fasting while breastfeeding?
PCOS and obesity – PCOS 5
The truth about salt
How to worsen diabetes: follow the ADA and CDA advice
The obesity epidemic
The difficulties of diagnosing PCOS - PCOS 4
"Is it okay to have cheat days?"
How Dolly turned her obesity and metabolic syndrome around
The lucrative story of cotton seed oil
Beat disease with crossfit, low carb and intermitting fasting
Hyperandrogenism – PCOS 3
Diabetes of bearded women – PCOS 2
Infertility, PCOS and the IDM program
What? Is fasting NOT crazy and stupid?
Vested interests and evidence-based medicine
When we eat is as important as what we eat – and this is why
Debunking the debunkers
What and when to eat to reduce insulin
Understanding obesity – the key to successful weight loss
Why there's more to weight loss than restricting calories
The Diet Wars or what you should eat to lose weight
The corruption of evidence-based medicine
New book: The Diabetes Code
Cutting calories won't solve your weight issues – do this instead
Moving away from the theory that cancer is simply a result of random mutations
The Warburg Effect and cancer
Attacking cancer's weakness: not its strengths
The 6 common features of cancer
The seed and soil of cancer – or why we need to zoom out to understand it
The powerhouses of the cell and human diseases
The ancient secret to 'hacking' the aging process
Why carbs and exercise are not the answers to reverse type 2 diabetes
The most important thing – practicing fasting safely
What diet causes cancer?
Autophagy – a cure for many present-day diseases?
Fasting, cellular cleansing and cancer – is there a connection?
Treating modern diseases like we're stuck in the 19th century
The corruption of the medical system and how it should change
Medical bias and how it impacts the treatment you receive
Darwin's theory of evolution or why cancer is not simply a result of random mutations
The history and future of cancer
Gleevec's false dawn or how we're losing the war on cancer
The Procrustean bed or how to make cancer into a disease of random mutations
The power of nutritional treatment
Why we're losing the war (on obesity, type 2 diabetes and cancer)
How to eat: fast and break-fast
The sword of Damocles and the Obesity Code podcast
Why you should avoid miracle weight-loss cures
The mistake of confusing the cause of cancer
Cancer as an environmental disease
Cancer as an endocrine disease
Hyperinsulinemia and Cancer
Obesity and Cancer
Fasting and Diseases of Excessive Growth
How Do You Beat Food Cravings?
The Corruption of Academic Medicine
Medications that actually work for type 2 diabetes
Failure of the glucotoxicity paradigm in type 2 diabetes
How NOT to treat diabetes
Are Supplements Necessary?
Insulin toxicity and modern diseases
Grazing or Fasting – and Why It Matters for Weight Loss
"Life. Is. Good."
Why high blood sugar is not the main problem in diabetes
Towards a Cure for Type 2 Diabetes
"Feeling amazing about life again"
Fatty Pancreas and the Development of Type 2 Diabetes
The unrecognized second phase of developing type 2 diabetes
How a thin person with diabetes reversed her type 2 diabetes
Is Bariatric Surgery Like Fasting in Type 2 Diabetes Treatment?
How to Not Get Hungry: Fasting and Ghrelin
Does eating 6-7 times a day make you eat less?
Does caloric restriction cause weight loss? Not according to science!
Why type 2 diabetes is a reversible dietary disease
Why red meat won't kill you
Intermittent Fasting Does Not Cause Muscle Loss
Triglycerides and Heart Disease – What's the Connection?
How Carbs Affect Your Cholesterol
Does eating extra fat make you fat?
Why Does Sugar Make People Fat?
What’s the Difference Between a Ketogenic and a Low-Carb Diet?
Intermittent fasting vs. caloric reduction – what's the difference?
Fructose and Fatty Liver – Why Sugar is a Toxin
Fructose and the Toxic Effects of Sugar
Fasting and muscle mass
The ancient secret of weight loss
A Trip to DiabetesVille
How Gina really healed herself from obesity and metabolic syndrome
Fasting and hunger
Insulin and fatty liver disease
Fasting and exercise
Why high insulin precedes type 2 diabetes
Fasting myths
A new paradigm of insulin resistance
Insulin Causes Insulin Resistance
How fasting reverses type 2 diabetes
Fatty Liver Disease or How Not to Make 'Foie Gras' at Home
Searching for the X Factor
Fasting and re-feeding syndrome
How fasting affects your physiology and hormones
Obesity – Solving the Two-Compartment Problem
Why Fasting Is More Effective Than Calorie Counting
Lose Weight on Twinkies? Big Soda's Strategy to Make Us Believe That It Is All About Calories
Fasting and cholesterol
The Calorie Debacle
Fasting and growth hormone
The Complete Guide to Fasting Is Finally Available!
How does fasting affect your brain?
Diabesity: Why Diabetes and Obesity Stem From the Same Problem
"Do You Have Any Suggestions to Improve Sleep When Fasting?"
Complications of Diabetes – A Disease Affecting All Organs
How to renew your body: Fasting and autophagy
Longer fasting regimens – 24 hours or more
Why High Blood Sugar Is Not the Main Problem
More practical tips for fasting
How Much Protein Should You Eat?
Short fasting regimens – less than 24 hours
Why Low Carb Is High in Fat – Not Protein
Practical tips for fasting
A Behind-the-Scenes Look at Medical Education
The common currency in our bodies is not calories - guess what it is?
"The Big Fat Fix" Movie Review
"You Can't Handle the Truth" – Dr. Gary Fettke Censored for Recommending Low Carb
How to Use Antibiotics: Why Less is More
The Futility of Blood Sugar Lowering by Medications in T2D
How Obesity Can Protect From Disease
How Kevin Hall Tried to Kill the Insulin Hypothesis with Pure Spin
The top 8 weight loss hacks
How to reverse type 2 diabetes - the quick start guide
Women and fasting
The dawn phenomenon – why are blood sugars high in the morning?
A new paradigm of insulin resistance
How Gino reversed his type 2 diabetes by doing the opposite
Reversing type 2 diabetes: Sunny and Cherie
Why the first law of thermodynamics is utterly irrelevant
How to fix your broken metabolism by doing the exact opposite
How NOT to Write a Diet Book
The Biggest Loser FAIL and That Ketogenic Study Success
The Diabetes Economy
Diabetes and the Dawn Phenomenon
The 7 practical benefits of fasting



Team Diet Doctor