Dietary restriction is a research area that involves studying the effects of reducing caloric intake or specific nutrients on health and longevity. This research aims to understand how changes in diet can impact metabolism, aging, and disease risk. Studies in this area often focus on the potential benefits of calorie restriction, intermittent fasting, and other dietary interventions in improving overall health and lifespan. Additionally, researchers investigate the mechanisms through which dietary restriction may exert its effects, such as changes in cellular processes, gene expression, and metabolic pathways. This research has implications for developing strategies to promote healthy aging and prevent age-related diseases.