Dr. Jason Fung is a Canadian nephrologist and bestselling author of The Obesity Code and The Complete Guide to Fasting. He has treated thousands of patients using therapeutic fasting protocols to reverse type 2 diabetes.
The Protocol Explained
Dr. Fung combines strict ketogenic eating with extended fasting periods to aggressively reduce insulin levels. His approach targets insulin resistance as the root cause of obesity and type 2 diabetes.
Macro Breakdown
Fat70%
Protein25%
Carbs5%
What to Eat and Avoid
Eat Freely
Fatty fish
Grass-fed meat
Eggs
Leafy greens
Olive oil
Butter and ghee
Bone broth
Coconut oil
Avoid
All grains
Sugar in any form
Processed foods
Snacking between meals
Alcohol
Fruit juice
The Science
1.Fung J. Canadian Journal of Diabetes 2018: Therapeutic fasting reversed T2D in 3 patients
2.Lim EL. Diabetologia 2011: 600-calorie restriction reversed T2D within 1 week
3.Harvie M. International Journal of Obesity 2011: Intermittent fasting superior to continuous restriction
Expected Results Timeline
Week 1-2
Insulin Drop
Initial fasting adaptation, insulin levels begin declining