There are so many factors that effect health its really hard to isolate one. I think moderation is key to preventing one of these things from having an undue

There are so many factors that effect health its really hard to isolate one. I think moderation is key to preventing one of these things from having an undue large effect. grandmother (Irish/English) drank and smoked a lot, she lived to her mid-nineties. She had a relatively stress free existence though. But she's one person and without an identical twin control, its hard to tell how much better she might have been had she abstained.