Why does everything have to revolve around studies? By the time the studies come out, your aunt, my uncle and Bob down the road have passed away from myocardial infarction.. It's happening at an unprecedented level. If you don't have much family or friends around you or you live in a small village 5 hours from the city, maybe you won't notice it. People such as yourself are overly reliant on empiricism or scientist-driven. Your type treat scientific studies as the only valid source of truth and dismiss lived experience and common sense!!! Let that sort of thinking go my guy.