51 With a 30-Year-Old Body? Watching Calories Works

Most of us have followed restricted-calorie diets at some point in our lives, but they tend to last, oh, two or three weeks until we give up on them because we are just too dang hungry. But Brit David Fisher has been counting calories for 20 years now -- and it's not because he's worried about his figure. He believes that restricting calories is the key to staying young beyond your years. And considering he's 51 and has, according to doctors, the body of a healthy 32-year-old, it looks like it's working. Yeesh -- I'll say.

Fisher sticks to 1,600 calories a day, which he gets mainly from vegetables supplemented with small amounts of meat. As for beverages, he sticks to water and black tea and stays away from alcohol. And, not surprisingly, he has no trouble maintaining a slim figure despite getting little exercise.

Restricting calories helps keep you young because it reduces the amount of free radicals produced in the body by digestion. That's the theory, anyway. Do you believe it?