The purer the diet the healthier...Americans have been industry victimized into consuming way too much processed foods containing all sorts of poisonous crap. The more chemical additives, the less actual nutrition and consuming empty calories does not satisfy, so more and more is eaten.... Then laziness is the order of the day. Technology has replaced body movement. Now they are advertising voice activated faucets...you don't even have to walk across the kitchen to get the water.
Good health and longevity are dependent on several factors....diet and proper exercise....uninvolvement in high risk activities...and inheritance.