Calorie restriction is a dietary approach that involves reducing calorie intake while maintaining adequate nutrition. Research has shown that calorie restriction can lead to a variety of health benefits, including increased lifespan, improved metabolic health, and reduced risk of chronic diseases such as cancer and diabetes. Studies have also shown that calorie restriction can help improve cognitive function and protect against age-related decline. Researchers are continuing to study the effects of calorie restriction on various aspects of health and longevity in both animal and human studies.