Forget the saber-toothed tiger steaks: a new study published this week reveals that ancient humans also ate their veggies. NPR's Scott Simon marvels at the menu.

Researchers have identified genes linked to vegetarianism. This may help explain why some people who are motivated to give up meat for ethical, environmental or health reasons, don't always adhere.

A diet composed of 80% ultra-processed foods led one British doctor to gain weight and feel unwell. Now he's trying to nail down the health effects of this type of diet, which many Americans eat.

Limiting when you eat to a six- or eight-hour window can help reduce caloric intake. While the weight loss isn't dramatic, it may be easier to stick to than counting calories.

The NIH will track the diets and lifestyles of 10,000 people to see how genetics, biology and the microbiome impact people's health. The study will use AI to tailor individual diet advice.