Simplified Explanation of Weight Loss

By Jason Fung, MD

A simple explanation of why weight loss is more than just calories. Food contains both energy (Calories) as well as instructions (Hormones) as to what to do with those calories. For any given amount of calories, our body can either use that energy (for metabolism) or store it (as body fat). Which one is chosen depends on the hormones.

Jason Fung, MD

Jason Fung, M.D., is a Toronto-based nephrologist (kidney specialist) and a world leading expert in intermittent fasting and low-carb diets.