  Throughout history, for reasons of health, well known personalities have
opted not to eat to satiety - to under-eat - with known benefits. Here, for the
benefits of under-eating a very simple explanation is offered and discussed in
some detail. Our distant ancestors, whose bodies we inherited, ate and weighed
a good deal less than we do. They had to run around every day to scour the
countryside for their scarce food, which kept them lean, hungry and healthy.
We, not so healthy relative over-weights, load up our shopping carts once a
week at the corner supermarket and simply eat too much for our ~50000-year-old
body design. Under-eating or not to eat one's fill appears to bring us somewhat
more in line with this design. Thereby, it causes our way of life to more
closely resemble the healthier one of our ancient forbears and enables us to
potentially live longer, to 100 and more. The putative underlying physiological
mechanisms for the health benefits of under-eating are of great interest and
therefore are touched upon here.
