My Aunt Helen, now long gone, God bless her soul, who, I'm told when she was young was "hell on wheels," used to say:
"If you don't smoke, drink, or chase girls you will live longer. Or at least it will seem longer."
Makes me sympathize with these rhesus monkeys. They suffer with a starvation diet so we can concoct some new miracle drug that will let us stay fat, lazy and live forever.
You have to hand it to the humans. We assume not one of us could actually be disciplined enough eat less on our own.
Bring on the DRUGS! Better living through chemistry baby!