What's the Best Diet for Weight Loss?

What’s the best diet for weight loss? So far, no one has found a magic bullet.

“We had three decades of low-fat, and we had a decade of ‘Oh, wait, no, maybe low- carb,’ and then at the end of that we said ‘Oh, never mind, neither of them works,’” says Christopher Gardner, director of nutrition studies at the Stanford Prevention Research Center.

But several glimpses of new evidence are giving researchers renewed hope. They’re looking not just at how many calories people eat and burn, but at their genes, the microbes in their gut, how much they sleep, and more.