For a country in which roughly 200 million people are overweight or obese, scientists today have discouraging news: Even those who maintain a healthy weight probably should be eating less.
Evidence has been mounting for years that the practice of caloric restriction — essentially, going on a permanent diet — greatly reduces the risk of age-related diseases and even postpones death. It has been shown to significantly extend the lives of yeast, worms, flies, spiders, fish, mice and rats.