Discussion: My wife has diabetes, and she is lean. I have seen a program of mice and humans that eat very little and live much longer. I'm pretty fat, from a family of overweight people who all lived to extreme old age.

People's life expectancy increases as their metabolic load decreases. Eating in moderation, especially easily digestible foods, lowers the metabolic burden. Although it is a significant factor, it is not the only one. A healthy lifestyle, stress, anxiety, and loneliness are equally critical factors.