I think if ppl took the concept of food and understood it as the most basic medicine we would have a ton less diseases :D
Studies show that if you consume less meat, if you actually cook instead of eating junk food, that alone is enough to increase your lifespan.
Even tho food is basically the main ingredient in constructing our body, the vast majority of ppl ignore it and don't study nutrition, going for the good old monkey see monkey do approach.
From what I know, this aging effect is mainly a DNA shortening problem, that can be solved with good nutrition, physical activity and mainly reduced stress :P
Stress is proven to reduce the production of Telomerase and that's one of the most vital factors in aging ;)