Karen Schroeder Kassel, MS, RD, MEd
Many people, especially women of childbearing age, infants, and pregnant women, may not take in as much iron as they need. However, there are many good food sources of iron to choose from. If your doctor advises you to increase your iron intake, consult the chart below to determine how much you need, and read on for some suggestions to meet those needs.
Your blood depends on iron to help it carry oxygen through the body. In some cases,
is caused by a lack of iron in the diet. Iron also helps your body to fight infection and to make collagen, the major protein that makes up connective tissue, cartilage, and bone. Other medical conditions may be worsened if you do not have enough iron.
Note: RDA=Recommended Daily Allowance in milligrams per day; AI=Adequate Intake
Iron exists in 2 forms—heme and nonheme. Heme iron is part of the hemoglobin and myoglobin molecules in animal tissues. It is found in meat and other animal sources. About 40% of the iron in meat is in the heme form. Nonheme iron comes from animal tissues other than hemoglobin and myoglobin and from plant tissues. It is found in meats, eggs, milk, vegetables, grains, and other plant foods. The body absorbs heme iron much more efficiently than nonheme iron.
The amount of iron your body absorbs varies depending on several factors. For example, your body will absorb more iron from foods when your iron stores are low and will absorb less when stores are sufficient.
In addition, certain dietary factors affect absorption:
To increase your intake and absorption of dietary iron, try the following:
Eat Right—Academy of Nutrition and Dietetics
The Vegetarian Resource Group
Dietitians of Canada
Iron. Office of Dietary Supplements website. Available at: http://ods.od.nih.gov/factsheets/Iron-HealthProfessional. Updated February 11, 2016. Accessed April 5, 2016.
Iron. Oregon State University Linus Pauling Institute website. Available at: http://lpi.oregonstate.edu/mic/minerals/iron. Updated August 2009. Accessed April 5, 2016.
Iron deficiency anemia in adults. EBSCO DynaMed website. Available at: http://www.ebscohost.com/dynamed. Updated April 4, 2016. Accessed April 5, 2016.
Zijp IM, Korver O, Tijburg LB. Effect of tea and other dietary factors on iron absorption. Crit Rev Food Sci Nutr. 2000;40(5):371-398.
Last reviewed April 2016 by Michael Woods, MD
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