Since I finished medical school 25 years ago, the scientific view of which best determines longevity has fluctuated. In the mid-1990s, most of the attention was on lifestyle changes: eating the right foods, getting the necessary amount of exercise and not smoking.
A decade later, after we mapped the human genome and began identifying longevity genes, my professors increasingly focused their attention on the family tree and our DNA. At the time, they believed that if your parents or grandparents had lived a long life, you were likely to do the same.”
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