The most common cause of anemia is a lack of iron. This is called iron deficiency. Iron is needed to make hemoglobin. Hemoglobin is the part of red blood cells that carries oxygen to the body. Most of your body’s iron is stored in hemoglobin.
Iron-deficiency anemia may be caused by the following:
- A diet low in iron. You get iron from foods you eat. But only 1 mg of iron is absorbed for every 10 to 20 mg of iron you take in. If you have a poor diet, you may have some level of iron-deficiency anemia.
- Body changes. Your body needs more iron and more red blood cells when it’s going through certain changes. These changes include growth spurts, pregnancy, and lactation.
- GI (gastrointestinal) tract abnormalities. Your body can’t absorb iron well after some forms of GI surgery. Most of the iron taken in by foods is absorbed in the upper small intestine. Any problems in the GI tract could affect how well you absorb iron. Surgery or medicines that stop stomach acid production will also decrease iron absorption.
- Blood loss. Loss of blood can cause a decrease of iron. Sources of blood loss may include GI bleeding, menstrual bleeding, or injury.
People who have a greater need for iron are at risk for this condition. This includes:
- Infants, young children, and teens (because of their rapid growth)
- Teen girls and women of childbearing age (because of their periods)
- Pregnant women
- Anyone with blood loss
- People with kidney failure
- People who have had gastric-bypass surgery (because of reduced absorption of iron)
Each person’s symptoms will very. Symptoms may include:
- Paleness or lack of skin color
- Lack of energy or tiring easily (fatigue)
- Increased heart rate (tachycardia)
- Sore or swollen tongue
- Wanting to eat strange things such as dirt or ice (a condition called pica)
- Feeling dizzy
The symptoms of iron-deficiency anemia may look like other blood conditions or health problems. Always see your healthcare provider for a diagnosis.
Your healthcare provider may think you have iron-deficiency anemia based on your symptoms and a complete medical history and physical exam. This condition is usually found through a blood test that measures the amount of hemoglobin present, and the amount of iron in your blood. Other tests may include:
- Additional blood tests for iron
- Bone marrow aspiration or biopsy. This involves taking a small amount of bone marrow fluid (aspiration) or solid bone marrow tissue (called a core biopsy). These are usually taken from the hip bones. The sample is checked for the number, size, and maturity of blood cells or abnormal cells.
- Upper or lower endoscopy. These tests may help rule out a source of blood loss.
Your healthcare provider will create a care plan based on:
- Your age, overall health, and medical history
- How sick you are
- What is causing the anemia
- How well you can handle certain medicines, procedures, or therapies
- How long the condition is expected to last
- Your opinion or preference
Treatment may include:
Eating a diet with iron-rich foods can help. Good sources of iron include:
- Meats, such as beef, pork, lamb, liver, and other organ meats
- Poultry, such as chicken, duck, turkey (especially dark meat), and liver
- Fish, such as shellfish, including clams, mussels, oysters, sardines, and anchovies
- Leafy greens of the cabbage family, such as broccoli, kale, turnip greens, and collards
- Legumes, such as lima beans and green peas
- Dry beans and peas, such as pinto beans, black-eyed peas, and canned baked beans
- Yeast-leavened whole-wheat bread and rolls
- Iron-enriched white bread, pasta, rice, and cereals
Iron supplements can be taken over a few months to increase iron levels in your blood. These supplements can irritate your stomach and discolor bowel movements. Take them on an empty stomach or with orange juice. This can help increase iron absorption. Supplements are much more effective than dietary changes alone.
Checking for a source of blood loss
This may include having an upper endoscopy or colonoscopy.
The best way to prevent iron-deficiency anemia is to eat a well-balanced diet that includes iron-rich foods. Talk with your provider about taking an iron supplement if you or your child:
- Can’t eat an iron-rich diet
- Have heavy monthly periods
- Have other risk factors
Iron-deficiency may be short-term (temporary). But if you have heavy monthly periods or other risk factors, you may need to address this throughout your life. Eat a well-balanced diet that includes iron-rich foods. Also talk with your provider about taking an iron supplement. Be sure to address any underlying blood loss or condition that may cause your anemia.
- Iron-deficiency anemia is the most common cause of anemia. It is due to a low level of iron in the blood.
- Causes include a diet that is low in iron, body changes, problems in the GI tract, and blood loss.
- Those most at risk include children and teens, women of childbearing age, and people with kidney failure.
- Common symptoms include fatigue, paleness, irritability, and fast heart rate.
- Treatment includes eating iron-rich foods, taking an iron supplement, and finding out if there is underlying blood loss.
Tips to help you get the most from a visit to your healthcare provider:
- Know the reason for your visit and what you want to happen.
- Before your visit, write down questions you want answered.
- Bring someone with you to help you ask questions and remember what your provider tells you.
- At the visit, write down the name of a new diagnosis, and any new medicines, treatments, or tests. Also write down any new instructions your provider gives you.
- Know why a new medicine or treatment is prescribed, and how it will help you. Also know what the side effects are.
- Ask if your condition can be treated in other ways.
- Know why a test or procedure is recommended and what the results could mean.
- Know what to expect if you do not take the medicine or have the test or procedure.
- If you have a follow-up appointment, write down the date, time, and purpose for that visit.
- Know how you can contact your provider if you have questions.
January 16, 2018
Gersten, Todd, MD , Finke, Amy, RN, BSN