Blueberries

Blueberries are among the most commercial berries in the world. Their colors range from indigo to dark purple. According to the U.S. Department of Agriculture, a cup of fresh blueberries contains 0.41 mg of iron, 14.4 mg of vitamin C, 3.6 g of fiber, 21.5 g of carbohydrates, 1.1 g of protein, and 8.88 mg of calcium. 

Blueberries have a high concentration of antioxidants known as polyphenols, anthocyanin, and flavonoids. Adding this purple fruit to your meals can improve your health drastically. Research shows it may improve symptoms of depression, post-traumatic stress disorder, and diabetes.