Discussion: My husband suffers from Fibromyalgia and is very thin. 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.

The life expectancy of people increases as the metabolic load on them decreases. Eating in moderation, incredibly easily digestible foods lowers the metabolic burden. Although it is a significant factor, it is not the only factor. A healthy lifestyle, stress, anxiety, and loneliness are equally critical factors.