AS A MEDICALLY TRAINED JOURNALIST I frequently come across claims that seem too good to be true and often are. Occasionally, after digging around, I reconsider my original position, acknowledge that what might appear at first to be outrageous could have something in it. As the economist John Maynard Keynes once said, “When the facts change, I change my mind.”
This happened to me when, in early 2012, I first heard about intermittent fasting. My initial reaction was skepticism. I assumed it would turn...