Caloric Restriction and Longevity

Caloric restriction is highlighted as a significant factor in promoting longevity and cognitive sharpness, as exemplified by the speaker's 92-year-old grandmother. She practices intermittent fasting, having her first meal of the day, a simple apple fritter, at around 11 a.m. This eating pattern, influenced by her upbringing during the Great Depression, involves consuming very few calories without forcing herself to eat more nutritious meals throughout the day. The research supports the idea that reducing caloric intake can lead to both increased lifespan and improved health span, particularly for individuals aged 60 and above.