Iron is needed to make haemoglobin, the protein that carries oxygen in red blood cells. Too little iron can cause problems, but tiredness, headaches or shortness of breath can have many causes. An online symptom list is not a diagnosis.
Discuss risk and testing
Menstrual blood loss, pregnancy, dietary intake and some health conditions can affect iron needs or stores. A clinician can decide which tests are appropriate and investigate the cause of a deficiency. Do not assume every vegetarian is deficient or that everyone who drinks tea needs supplements.
Food sources
Meat and some seafood provide haem iron. Beans, lentils and other plant foods provide non-haem iron. Vitamin C can help the absorption of non-haem iron. The overall meal and individual circumstances matter; the issue is more nuanced than avoiding all caffeine with food.
Avoid treating yourself blindly
Iron supplements can cause side effects and excessive intake can be harmful. Use them according to appropriate advice, and keep them away from children. Persistent or severe symptoms need medical assessment.
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