I am a scientist and self-professed CRON (Caloric Restriction Optimal Nutrition) dieter. Although I must admit that am not as obsessive with it as some. Research suggests that restricting calories can extend life and even increase synapse health in parts of your brain. I notice a big difference in the way I feel when following a diet of less than 1500 calories/ day. The Calorie Counter app by FatSecret is an awesome way to track what you eat and stay healthy!