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What are the benefits of eating a calorie-restricted diet?

Consuming significantly fewer calories - up to 30 percent less daily - while still packing in necessary nutrients could increase your lifespan by about four or five years, some scientists say. In some studies, a person's quality of health improves on such a restricted diet, with lower blood pressure and a better immune system. Some people also exhibit lower body temperatures and lower insulin levels, which are thought to be linked to longevity.

Restricting calories isn't wise for children, because it can stunt their growth; it's also dangerous for the elderly and the ill. An extreme calorie restriction, such as 60 percent of daily intake, results in starvation in mice.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.