The video associated with this article connects iron with mood and energy. This article focuses on iron's roles in the body and the limits of using symptoms to identify a deficiency. Fatigue, low mood and weakness can have many causes.
Iron, fatigue and testing
The body uses iron to make hemoglobin, which carries oxygen, and myoglobin, a protein in muscle. Iron is also involved in some hormones. A deficiency can contribute to anemia, but symptoms such as tiredness, changes in mood or low energy do not confirm iron deficiency.
Iron is found in foods such as meat, some beans and leafy greens. Iron from plant foods is absorbed differently from iron in animal foods; vitamin C in the same meal can help the body absorb plant-based iron. The amount of iron a person needs depends on age, sex and health.
Too much iron can be harmful. A healthcare professional may consider blood-test results and medical history when assessing possible anemia. Do not take iron supplements to improve mood or energy without appropriate advice.
What to do if symptoms persist
- Tell a healthcare professional about unusual or ongoing fatigue, palpitations or weakness.
- Ask whether testing for anemia and its possible causes is appropriate.
- Check supplement labels and seek professional guidance before starting iron tablets.
This is general educational information, not an examination, diagnosis or personal treatment plan. Contact a healthcare professional about sudden or severe symptoms, and before changing medication or supplements.
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