Dragon fruit, also known as pitahaya or strawberry pear, is a tropical fruit known for its vibrant red skin and sweet, seed-speckled pulp. Dragon fruit is high in vitamin C and other antioxidants, which are good for your immune system. It can boost your iron levels. Iron is important for moving oxygen through your body and giving you energy, and dragon fruit has iron. And the vitamin C in dragon fruit helps your body take in and use the iron.