In a one-year study of four popular diets--Atkins (low carb), Ornish (vegetarian, low fat), Weight Watchers (low calorie) and the Zone (moderate carbs)--Tufts researchers found that all successfully promoted significant weight loss in 160 overweight men and women. The four diets also lowered the risk of heart attack, but Ornish did so a bit less effectively than the others. --By Sora Song
To continue reading:
Want the full story?
Get TIME the way you want it
Week Digital Pass — $4.99
Pay-As-You-Go DIGITAL ACCESS — $2.99
Year ALL ACCESS — Just $30! Best Deal!
Print Magazine + Digital Edition +
Subscriber-only Content on TIME.com
Learn more about the benefits of being
a TIME subscriber
If you are already a subscriber sign up — registration is free!