Dr. Jason Fung, MD
Nephrologist, Intermittent Fasting Expert
Dr. Jason Fung is a Canadian nephrologist and clinical researcher who pioneered the use of therapeutic fasting to reverse type 2 diabetes. His framework treats chronically elevated insulin as the sole proximate cause of obesity. The fasting tracker inside RealFoods is grounded in Fung's clinical protocols for suppressing insulin through timed eating windows.
Key works
The Obesity Code (2016)
The definitive clinical case that insulin, not calories, is the hormonal driver of body weight regulation.
The Complete Guide to Fasting (2016)
A practical and clinical guide to intermittent and extended fasting for metabolic reset.
The Diabetes Code (2018)
How to reverse type 2 diabetes by targeting insulin resistance, not blood glucose readings alone.
Areas of expertise
- Intermittent Fasting
- Insulin Resistance
- Type 2 Diabetes Reversal
- Therapeutic Fasting
- Obesity
- Metabolic Health
- Nephrology
