Finding the Right Iron Supplement

Consumers who have been diagnosed with iron deficiency anemia often turn to iron-containing dietary supplements to boost their blood levels; however, the wide variety of iron preparations available can make selecting the best product challenging. The National Anemia Action Council (NAAC) reviewed the types of iron supplements, as well as bioavailability and efficacy.

It suggested selecting ferrous iron supplements—whether ferrous sulfate, fumarate or gluconate—and checking the label for the amount of elemental iron each tablet delivers, as anemic adults can require up to 200 mg/d of elemental iron. Further, while there are many delivery forms, from tablets to liquids and extended release options, NAAC said tablets and capsules are best absorbed and most economical.

The group also noted iron supplements are associated with several common side effects, including upset stomach and constipation. Tips to minimize these effects include starting with a lower dose and gradually increasing to the full amount, and taking a stool softener. To optimize iron absorption, consider taking iron with vitamin C or a vitamin C-containing food. Avoid consuming iron supplements milk, calcium or caffeine, as they can decrease iron absorption.