Count your calories even if you don't need to as a recent study has suggested that cutting calories can extend your lifespan. Overeating can lead to health issues that can shorten one's life such as obesity diabetes and heart disease. On the other end of the spectrum several studies have shown that restricting calorie intake below what a normal diet would dictate may lead to a longer life. In an animal study Huiru Tang Yulan Wang Yong Liu and colleagues report the metabolic reasons why these opposite diets may lead to such differences in longevity. The group divided mice into
