Is drinking while trying to lose weight a smart idea? Learn how alcohol impacts energy balance, metabolism, exercise performance and more.

What does the science say about intermittent fasting, specifically time-restricted eating and its purported health benefits? Does it matter how long you fast or when you stop and start your fast? What is the best form of fasting and what are some of the challenges to doing it regularly?

Here's the low-down on 4 of the most popular diets including keto, paleo, whole30, and intermittent fasting. Do they actually work for weight-loss? And should you try them?