The immediate consequences of a shortfall in iron are fatigue and feeling short of breath. This happens because the body is unable to make the protein haemoglobin, which the blood cells need to transport oxygen to different muscles. Without it, the muscles receive insufficient oxygen and lose their ability to work effectively. This could cause the lower eyelid to lose its normal pink colour and appear pale.
The haemoglobin in blood cells is what gives blood its red colour, so low levels caused by iron deficiency can make the blood less red.
This is why doctors often look for paleness in their patients when looking for signs of iron deficiency.
Paleness in the lower eyelids can be revealed by gently pulling down the lower lid.
A normal eye will usually show a pale pink colour in the region, but without iron, the inner eyelid appears more white.
READ MORE: Iron deficiency: The everyday feeling which may intensify
A 2016 report published in the American Journal of Haematology, states that up to a third of the world’s population is anaemic, a third being due to iron deficiency.
According to the National Health, Lung and Blood Institute: “People with milk or moderate iron-deficiency anaemia may not have any symptoms.
“More serious iron-deficiency anaemia may cause common symptoms of anaemia, such as tiredness, shortness of breath or chest pain.”
The health body says common symptoms include
- Fatigue
- Dizziness or lightheadedness
- Cold hands and feet
- Pale skin.
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If all the above signs are present, a doctor is likely to recommend treatments based on the cause and severity of the condition.
Treatment may range from dietary changes and supplements to medicines and surgery in extreme cases.
Sometimes, severe iron deficiency can require a blood transfusion, iron infections or intravenous therapy.
Whatever the stage of the condition, treatment is vital, as iron is critical for the development of the body.
READ MORE: Iron deficiency: Some ‘unusual cravings’ may signal it
According to a report published in the journal Nutrients, comparing both forms of iron, heme iron may be “essential” for humans.
The report states: “Non-heme iron, which accounts for the majority of the iron in plants, is less well absorbed. More than 95 percent of functional iron in the human body is in the form of heme.”
The HSPH adds: “Meats, poultry and seafood are richest in heme iron. Fortified grains, nuts, seeds, legumes, and vegetables contain non-heme iron. In the US many breads, cereals, and infant formulas are fortified with iron.”
Good dietary sources of heme iron include:
- Oysters, clams, mussels
- Beef or chicken liver
- Organ meats
- Canned sardines
- Beef
- Poultry
- Canned light tuna
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