We’re a nation of dieters. Four in 10 of us claim that we’re trying to lose weight by trying every new diet fad, often without paying much attention to whether they really make scientific sense.

Since most people need to consume between 1,600 and 3,000 calories to maintain their weight, trying a 1,200-calorie diet plan creates a significant calorie deficit that can promote rapid weight loss.

Forget about super-sizing, a restricted-calorie diet may add health, youthfulness, and longevity to your life. 7 min read Looking to tack a few years on to the end of your life, or enjoy your ...