Intermittent fasting promises simplicity in a world of complicated diets—but does it actually deliver better health? In this episode, we look at the evidence behind time-restricted eating, from the popular “5–2” plan to daily fasting windows, and unpack why studies show it’s often no more effective for weight loss than old-fashioned calorie counting. Beyond the hype, we explore the tantalizing animal research on longevity and autophagy, and why human trials remain frustratingly mixed when it comes to insulin, cholesterol, and overall metabolic health. And we don’t shy away from the risks: strict fasting can cost you muscle and may even weaken immunity. So is intermittent fasting a metabolic reset—or just another diet dressed up in science? We break it down.

https://www.economist.com/science-and-technology/2025/02/07/does-intermittent-fasting-work