Blueberries are excellent source of vitamins C and K, and a good source of manganese. They are also a good source of dietary fiber, which are essential for a healthy diet.
Blueberries have one of the highest antioxidant capacity among all fruits. Antioxidants are known to work to neutralize free radicals, which are associated with development of cancer, cardiovascular disease, and other age-related conditions.
One study showed that blueberries can improve memory.