Fasting Diets Are Going Mainstream—Ahead of the Science. Here’s Why.

When John Kane was approaching 50, he noticed his weight had crept up to 275 pounds. At 6-foot-2 and medically obese, he turned to the gym to slim down, doing an aerobic workout five days per week. But the regular gym sessions became tiresome after a few years, and when Kane stopped exercising, he gained back all the weight. That’s when he decided to experiment with something else: fasting.

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