Iron deficiency is one of the most common nutritional deficiencies among women in the UK, particularly during the reproductive years. Heavy menstrual cycles, pregnancy, postpartum recovery and restrictive diets can all increase iron requirements.
While mild deficiency can go unnoticed, prolonged low iron levels may impact energy, cognitive function and overall wellbeing. Recognising early signs — and seeking appropriate testing — is important.
Why Women Are at Higher Risk
Women require more iron than men due to menstrual blood loss. During pregnancy, iron needs increase further to support expanding blood volume and fetal development. Vegetarian or vegan diets may also require careful planning to maintain adequate intake.
Common Signs of Iron Deficiency
Persistent Fatigue
Feeling unusually tired despite adequate sleep is one of the most common symptoms. Iron supports normal oxygen transport in the blood, and low levels may reduce energy availability.
Shortness of Breath or Dizziness
Reduced oxygen delivery can lead to breathlessness during mild activity or lightheadedness.
Hair Thinning or Brittle Nails
In more advanced deficiency, hair shedding or nail changes may occur.
Pale Skin
Lower haemoglobin levels can contribute to a paler appearance, particularly in the inner eyelids.
Restless Legs
Iron deficiency has been associated with restless legs syndrome in some individuals.
How to Confirm Iron Deficiency
Symptoms alone are not enough to diagnose iron deficiency. A GP can arrange a blood test to measure haemoglobin and ferritin levels. Ferritin reflects stored iron and is often the most useful marker in early deficiency.
Dietary Sources of Iron
Haem iron (from animal sources such as red meat and poultry) is generally more easily absorbed than non-haem iron (from plant foods such as lentils, spinach and fortified cereals). Pairing plant-based iron with vitamin C-rich foods may improve absorption.
Should You Take an Iron Supplement?
Iron supplementation should be started following medical advice if deficiency is confirmed. Excess iron can cause gastrointestinal side effects and is not beneficial for individuals with normal iron levels.
If prescribed, your GP will recommend an appropriate dose and duration, with follow-up testing to ensure levels return to a healthy range.
Final Thoughts
Iron deficiency is common, particularly among women of childbearing age. Recognising symptoms early and seeking appropriate testing can help prevent progression to iron-deficiency anaemia.
This article is for educational purposes only and does not replace medical advice. Always consult your GP or a qualified healthcare professional before starting supplements.
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