When iron deficiency is diagnosed, the doctor must also determine the cause. Occasionally, however, iron deficiency signals ulcers or even colon cancer. Many premenopausal women become marginally iron deficient unless they supplement with iron. Keep iron-containing supplements out of a child's reach. Supplementing iron can be quite dangerous for people with these diseases.
Supplemental amounts required to overcome iron deficiency can cause constipation .
Sometimes switching the form of iron, getting more exercise, or treating the constipation with fiber and fluids is helpful. Sometimes the amount of iron must be reduced if constipation occurs. 10 None of these links has been proven. Nonetheless, too much iron causes free radical damage, which can cause or exacerbate most of these diseases. People who are not iron deficient should not supplement iron when potential risks might exist and no benefit can be found.