Updated: August 5, 2012 6:07AM
Here’s a look at the three diets used in the study:
Similar to the Atkins diet, with only 10 percent of calories from carbohydrates, 30 percent from protein and 60 percent from fat. This diet emphasized beef, fish, chicken, eggs, cheese, some vegetables and fruits, while slashing breads, pasta, potatoes, rice, cakes, cookies and starchy vegetables.
This diet that was about 20 percent of calories from fat, 60 percent from carbohydrates and 20 percent from protein. It emphasized whole-grain products and fruits and vegetables, and it cut way back on oils, nuts, fatty meats and other high-fat foods.
A low-glycemic index diet, similar to a Mediterranean diet, was made up of vegetables, fruits, beans, healthy fats (olive oil, nuts) and mostly healthy grains (old-fashioned oats, brown rice). It got about 40 percent of calories from carbohydrates, 40 percent from fat and 20 percent from protein.