Giant Study Reveals The Secret to Heart Health Isn't Low-Carb or Low-Fat

A Harvard-led study of nearly 200,000 U.S. health professionals over about 30 years found that diet quality matters more than carb or fat counts alone.

Low-carb and low-fat diets were linked to better heart outcomes only when they emphasized vegetables, fruits, whole grains, and healthy fats.

Diets centered on processed foods and animal fats or proteins were less beneficial, even when they fit low-carb or low-fat labels.

The findings reinforce that whole, minimally processed foods may be the best path to lowering cardiovascular risk.