The Health Benefits of Iron

Benefits, Side Effects, Dosage, and Interactions

In This Article

Iron is one of the most vital minerals. While all human cells contain iron, it is mostly found in red blood cells. The health benefits of managing iron levels include eliminating fatigue and many of its sources. Iron also plays a vital role in immune system function, treating anemia, boosting hemoglobin, and much more. 

Iron overdoses are rare and most of the time, if there is more iron in the body than necessary, the body will save it for future use. Most people get all the iron needed from their diets, but certain illnesses make it necessary to use iron supplements. 

Health benefits of iron
Illustration by JR Bee, Verywell

Health Benefits

Treats Anemia

Iron is helpful for treating anemia, one of the most common nutritional deficiencies in the world. Anemia results when hemoglobin is below normal ranges. Symptoms of anemia include fatigue, dizziness, fast heart rate, and malaise, or an overall feeling of sickness and weakness.  

Boosts Hemoglobin 

The chief function of iron is to form hemoglobin, a red protein whose main purpose is to transport oxygen in the blood. Additional hemoglobin is important because humans lose blood in many ways, especially from injuries. Women lose blood every month during their menstrual cycles, which is one of the most common reasons women may be more likely to suffer from anemia.

Reduces Fatigue 

Iron may help manage unexplained fatigue, which can affect both men and women. Even in someone who isn’t anemic, low iron can still reduce energy levels. This is especially common in women during their reproductive years.

Fatigue from iron deficiency involves more than just a normal level of sleepiness. It causes tiredness that interferes with a person's daily routine—activities feel exhausting and less enjoyable.

People with low iron experience fatigue lasting several weeks or longer. Iron-rich foods and supplements can help raise iron levels and eliminate feelings of tiredness and exhaustion.

Improves Muscle Strength 

Muscle weakness and low iron are linked. Adequate levels of iron help provide the necessary oxygen for muscle contraction. Research shows that low iron can cause the loss of muscle tone and elasticity. (Muscle weakness is one of the most common signs of anemia.)

Low iron also makes muscles fatigue easier. A lack of iron will also leave muscle tissues inflamed, causing pain. Iron-rich hemoglobin helps to reduce pain because it repairs affected issues.

Boosts Immunity 

Iron plays an important role in strengthening the immune system. It promotes hemoglobin which provides oxygen to damaged cells, tissues, and organs. A strong immune system is able to fight against diseases and infections. Therefore, without iron, the healing process cannot start. 

Improves Concentration             

Research shows that cognitive levels drop with iron deficiency. When iron levels in the blood drop, concentration and attentiveness is affected almost immediately. Getting levels restored can improve concentration and boost cognitive performance. 

Reduces Bruising

People who bruise easily and frequently might be suffering from low iron or an actual deficiency. This is because hemoglobin affects production and function of platelets, which control blood-clotting. Frequent bruising is an indication that internal clotting isn’t working as it should. If low iron is the cause of easy and frequent bruising, then iron supplementation can help.

Restores Sleep 

Research shows a connection between low iron stores and sleep issues, including restless sleep, sleep apnea, and insomnia. Research has found restless sleep in autistic children can be improved with iron therapy.

Possible Side Effects

Upset stomach is the most common side effect of iron supplements. The risk of iron overload in a diet is low in most healthy adults. People with certain genetic disorders are at risk for an iron overload if their conditions cause them to absorb more iron from food. 

Iron overload may cause a buildup of iron in the liver and other organs as well as the creation of free radicals that damage cells and tissues. This increases the risk for certain cancers. 

Taking high doses of iron supplements can cause nausea, vomiting, and stomach pains. There are very rare cases of iron overdoses leading to internal bleeding, seizure, coma, and even death. 

Iron supplements can decrease the effects of certain medications, including those for treating restless leg syndrome and thyroid problems. Reflux disease medications can reduce the amount of iron that the body absorbs from food and supplements. It is always important to discuss with a physician if you should take an iron supplement or not, especially if you take any prescription medication.

Dosage and Preparation 

The recommended doses for oral iron supplementation for most adults range from 8 milligrams (mg) to 27 mg. The higher doses usually apply to pregnant woman and people who are iron deficient. Iron supplements should be taken with food.

Other Questions

What is the best way to achieve optimal levels of iron?

The best way to achieve optimal levels of iron is through diet rather than supplements. This minimizes the risk or overdose and ensures good iron intake along with other nutrients. 

Is it dangerous to take iron supplements if I am not anemic?

Anyone considering an iron supplement should talk to a doctor. It is possible that a person could attribute symptoms to an iron deficiency when the symptoms are actually related to another health condition. Excess iron can be dangerous and iron supplements are only recommended in cases of diagnosed deficiency, or where someone is at high risk for an iron deficiency. 

A Word From Verywell 

Iron is an essential mineral that exists in the human body. Regulating our iron levels is important for reducing fatigue, treating anemia, boosting immunity, among many other health benefits. It is important to not take an iron supplement unless you are iron deficient—speak with your doctor or health care provider if you feel you are experiencing iron deficiency. Your symptoms could be related to another health condition.

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