How Much Iron Do You Actually Need Each Day?
Iron is a key building block of hemoglobin, the protein that carries oxygen throughout your body, so not getting enough can lead to iron-deficiency anemia, fatigue, and dizziness. How much you need depends on your sex and age group — women of reproductive age in particular need more than men of the same age because they lose iron through menstruation every month. Select your sex and age group above to see your recommended daily allowance (RDA) alongside the iron content of common foods.
Animal vs. Plant Iron: Absorption Rates Differ
Heme iron from animal foods like beef, oysters, and chicken liver is absorbed by the body far more efficiently than non-heme iron from plant foods like spinach and lentils. If you eat mostly plant-based, you may need to eat larger amounts of iron-rich foods or pair them with vitamin C-rich fruits and vegetables, which boost non-heme iron absorption. On the flip side, tannins in coffee and tea can inhibit iron absorption, so it is better to drink them well apart from meals rather than right after eating.
Do not Ignore the Signs of Low Iron
Low iron can show up as persistent fatigue, dizziness, frequent headaches, brittle or thin nails, and unusually pale skin. If these symptoms stick around, it may be more than ordinary tiredness — it is worth getting a blood test to check for iron-deficiency anemia. Use this guide to check whether your typical diet, drawing from the foods listed above, is falling noticeably short of your recommended intake.
Frequently Asked Questions
Women of reproductive age lose iron through menstruation each month, so they need more dietary iron than men of the same age to maintain healthy iron stores. This gap narrows after menopause.
Most people can meet their iron needs through a balanced diet. However, if you have been diagnosed with anemia or eat a mostly plant-based diet, a supplement may be needed - check with your doctor and a blood test to be sure.