Researchers at the Albert Einstein College of Medicine of Yeshiva University have found that many very old people — age 95 and older — could be poster children for bad health behavior with their smoking, drinking, poor diet, obesity and lack of exercise.
The very old are, in fact, no more virtuous than the general population when it comes to shunning bad health habits, leaving researchers to conclude that their genes are mostly responsible for their remarkable longevity.
https://www.livescience.com/15362-live-100-longevity-good-genes.html