As a longevity researcher and regenerative medicine doctor, I've spent more than 20 years helping people develop healthy habits to live longer. Blueberries are one of the foods I eat every day to promote longevity. They are tasty, low in calories, and filled with vitamins and antioxidants that protect your body from infection like a suit of armor. Here's why I consider it the holy grail of longevity-boosting foods: 1. They strengthen your cells Feeling out of the loop?