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About Iron Deficiency Day

About Iron Deficiency Day

The importance of Iron and Iron Deficiency

Simply put, without enough iron, the human body cannot work properly. Iron is required throughout the body. It is essential for the production of red blood cells, and ensuring that the heart and skeletal muscles can function effectively3. Iron also plays a vital role in fighting off infections and illness4, maintaining energy levels4 and normal brain function.

Iron deficiency means that there is not enough iron available in the body to enable it to function properly6.

When the body's available iron stores are low (iron deficiency) it can impact almost all aspects of life, such as your metabolism, mental and physical health, work productivity and even sexual function4,7. The World Health Organization states that iron deficiency can lead to a reduction of 30% in physical work output8.

Want to know the full effects that iron has on the body? Take a look at our Role of Iron infographic.



Iron Deficiency Anaemia

Iron deficiency is the main cause of anaemia9. It occurs when the level of iron stored in the body is so low, or non-existent, the body can no longer make enough haemoglobin needed to develop healthy red blood cells10. Haemoglobin is the protein found inside red blood cells that carries oxygen to tissues and organs throughout the body, which is essential for them to function properly11.

To better understand the meaning of different iron levels, take a look at this infographic.

Different Iron Levels


Iron deficiency, or iron deficiency anaemia?

There is a clinical difference between iron deficiency and iron deficiency anaemia6. Having low iron availability (iron deficiency), doesn't necessarily mean you will develop iron deficiency anaemia. To determine whether someone is iron deficiency or has iron deficiency anaemia, a blood test is performed which will look at a number of things:

Prevalence of iron deficiency

Iron deficiency is very common, present in one-third of people around the world2. It is most prevalent in premenopausal and pregnant women and children under the age of five15. In Europe for example, iron deficiency affects up to 33% of pre-menopausal women, up to 77% of pregnant women, and up to 48% of children15.

Iron deficiency also often affects those with chronic inflammatory diseases. It is estimated to affect 37-61% of patients with chronic heart failure (CHF), 24-85% of patients with chronic kidney disease (CKD) and 13-90% of patients with Inflammatory bowel disease (IBD)6.


Despite the serious consequences and high prevalence of iron deficiency16, it is an under-recognised condition17,18. As a result, many people are unaware that their health and well-being are being compromised. Even among those who are aware of iron deficiency, some still cannot recognise its symptoms19.

It is because of this lack of awareness that we are focused on education about the symptoms and impact of iron deficiency. If you recognise any of the symptoms, we recommend that you speak to a healthcare professional. Take a look at the Symptom Checker to find out more about the numerous and varied symptoms.


The consequences of iron deficiency differ from person to person, but it can be linked to an overall decline in general health and well-being, as well as an increase in fatigue20. Even in the absence of anaemia, iron deficiency can be debilitating, and exacerbate any underlying chronic disease, leading to increased morbidity and mortality6. In children, iron deficiency can significantly impair cognitive and motor development21.

Causes of iron deficiency

People of all ages can become iron deficient, but there are certain times in life and certain lifestyle choices, that can make it more likely to happen: