Study of diets shows what truly counts: calories

Two decades after the debate began on which diet is best for weight loss, a conclusion is starting to come into focus. And the winner is . . . not low-carb, not low-fat, not high protein but . . . any diet.

That is, any diet that is low in calories and saturated fats and high in whole grains, fruits and vegetables -- and that an individual can stick with for a lifetime -- is a reasonable choice for people who need to lose weight. That's the conclusion of a study published online Wednesday by the New England Journal of Medicine, research that represents the longest, largest and most rigorous test of several popular diet strategies.