Despite their diminutive size, blueberries pack quite a powerful, healthy punch. Blueberries contain a compound known as anthocyanin, which gives them their blue hue but also contributes to their nutritious properties. For example, the Mayo Clinic notes that studies have found consumption of foods that are high in anthocyanins can help individuals lower their risk of developing coronary heart disease. In addition, blueberries are a good source of vitamin C and dietary fiber, making them worthy of addition to anyone's diet.