As I was researching my newest book “Radical Longevity,” I took a good hard look at the longest living populations from Okinawa, Japan, and Sardinia, Italy, to Costa Rica, Greece, Loma Linda, California, and the Ashkenazi Jews from Eastern Europe.
What were they doing differently? Was it just good genes? Apparently not, because, according to a Danish population-based Twin Study on health, genetics only accounts for about 20 percent to 30 percent of longevity factors.
