Thousands of books have been written about the latest and greatest diets that will help people lose weight and improve health. But a key element in any successful nutritional health program is a tried-and-true method that most people haven't thought about--yet it could be revolutionary for taking health to the next level. This ancient secret is fasting.

Fasting is not about starving oneself. When done right, it's an incredibly effective therapeutic approach that produces amazing results regardless of diet plan. In fact, Toronto-based nephrologist Dr. Jason Fung has used a variety of...