Iron is an essential mineral and an important component of hemoglobin, a substance in red blood cells that carries oxygen from our lungs to the rest of our body. Hemoglobin uses about two-thirds of our body's total iron. If we're lacking iron, our body can't produce enough red blood cells, which can affect our oxygen level and make us feel tired. Kid's Chewable Iron is a convenient way to get the iron we need to help maintain healthy blood.