Iron is a mineral found in food that plays a very important role in our body. It helps to produce red blood cells and carry oxygen to different places in the body. The amount of iron that your body needs depends on various factors such as your age, gender, and lifestyle needs (such as athletes or pregnant women). When your body does not get enough iron, you may develop iron deficiency. If iron deficiency is left untreated, it can progress to iron deficiency anemia.