Restricting Calories for Longevity? 

Although known to negatively impact dieters, a slower metabolism may actually have some beneficial effects. Calorie restriction has demonstrated to increase animal lifespan, and this might be due to metabolic slowdown. For instance, the tortoise can live for close to 200 years, while rabbits usually live between 10 to 20 years. This could be due to the creation of cleaner-burning and more efficient mitochondria in the body. Furthermore, reduced oxidative stress can be expected to improve our healthspan. Recent studies have been conducted to test the effects of caloric restriction, which has shown significant improvements in cholesterol levels, triglycerides, insulin sensitivity, and blood pressure in participants. While calorie restriction may have long-term positive effects, there is still some uncertainty regarding its impacts on human longevity.