If you feel persistently tired, notice hair changes or struggle with your usual activities, it is natural to wonder about iron.
Before reaching for a supplement, I want to understand whether your iron stores are depleted, whether iron is being kept in storage, or whether both are happening.
Low circulating iron does not always mean that your body has run out of iron.
Why iron matters
Iron is needed to make haemoglobin, the protein in red blood cells that carries oxygen.
It also contributes to energy production and normal thyroid function.
When iron stores become depleted, your body may have less available for these important jobs. Iron deficiency can occur before anaemia develops.
When the body puts iron under lock and key
During infection, inflammation or certain chronic diseases, the body can deliberately reduce the amount of iron available in circulation.
Think of iron as a valuable resource stored in a cupboard. Under normal circumstances, the body opens the cupboard and releases what is needed.
When inflammation rises, the liver can produce more of a hormone called hepcidin. Hepcidin acts rather like turning the key in the lock.
It reduces iron absorption from the intestine and limits the release of iron from storage cells.
This is partly a protective response. Many microbes, particularly bacteria, need iron to grow, so limiting access to it is one way the body responds to infection.
The iron may still be in the cupboard, but less is reaching the places that need it.
Why this can affect your health
If this restriction continues, less iron may be available to make red blood cells, even when stored iron appears adequate.
This is sometimes called functional iron deficiency or iron restriction associated with inflammation.
It differs from having genuinely depleted iron stores, although the two can occur together.
The important question becomes: is there too little iron, difficulty accessing it, or both?
Looking beyond one result
Ferritin helps assess stored iron, but it can also rise during infection or inflammation. A normal or raised result does not always exclude iron deficiency.
Serum iron measures iron circulating at the time of testing. It can fall with inflammation as well as depleted stores.
Transferrin, iron binding capacity and transferrin saturation help us understand iron transport and availability.
A full blood count provides information about haemoglobin and red blood cells. Inflammation markers, such as CRP, help put the iron results into context.
This is why I consider the complete pattern rather than recommending iron from one result.
Why might iron stores become depleted?
I consider food intake, blood loss and digestive difficulties that may affect absorption.
For women, heavy menstrual bleeding is an important part of that conversation.
A history of infection, inflammatory illness or chronic disease also matters because it can change how iron is handled.
My approach
I review your symptoms, menstrual history, digestion, food intake, previous treatment and blood results.
Where appropriate, I may recommend a fuller iron panel, inflammation markers or further investigation of possible blood loss or absorption difficulties.
Support may include improving nutritional intake and selecting iron replacement when a need has been established. If inflammation is restricting iron availability, that underlying process also needs attention.
The aim is to understand why iron is low and choose support that matches the cause.
If you feel you need support in this area, please reach out and let’s take the next steps together towards improving your overall wellbeing.
Lisa Cahill
Qualified nurse and naturopathic nutritionist
Evolve Female Wellness
lisa@evolvefemalewellness.com
Iron and other supplements are not recommended simply because you feel tired or have one low result. They do not suit everybody. Individual assessment and appropriate blood testing are essential before use, as unnecessary iron can be harmful.