Like everybody, you want to live a long, happy and disease-free life. So what’s the first thing you should do? Change your diet. Along with regular exercise, diet is one of the most important factors behind longevity. Researchers have been studying Okinawan residents for their longevity, the residents of the San Blas islands for the absence of heart disease in their communities, and Seventh Day Adventists, who tend to live 7 years longer then the rest of us and have suggested their diet as the main cause of longevity. Keep in mind that a poor diet can lead to heart disease, cancer and diabetes, and a panoply of other conditions. Eat your heart out Ponce de Leon, here are 10 foods to help you live longer.