Iron deficiency test with ferritin, iron and transferrin

Iron is a building block your body needs to carry oxygen through your blood. When your reserve runs down, it can show up as fatigue, pale skin, feeling cold or trouble concentrating. An iron blood test looks at several values at once, so you do not have to rely on a single number.

A single iron value in your blood fluctuates during the day and says little on its own. By also including your ferritin (your iron store) and how iron is transported, a more nuanced picture emerges that you can review with a doctor.

This test can be useful if you have symptoms that might fit with low iron, or if you simply want to know where you stand. Think for example of:

• women with heavy or long-lasting periods
• women with ongoing fatigue or low energy
• those eating a plant-based or vegetarian diet, where iron can be harder to absorb
• women with a wish to conceive or during pregnancy, when the need for iron may rise

Also, if you previously had low iron and want to know how your iron status looks now, such a measurement can be valuable.

This panel measures four values that together can say something about your iron balance:

• Ferritin: the protein that stores iron, often seen as an impression of your iron reserve.
• Iron (Serum): the amount of iron circulating in your blood at that moment.
• Transferrin: the transport protein that moves iron through your body.
• Transferrin Saturation: shows how much of your transferrin is actually loaded with iron.

By placing these values side by side, a broader picture emerges than a single iron value can give.

Together, these values can give an impression of your iron store and how your body is handling iron at that moment. A low ferritin may fit with a reduced reserve, for example, while your transferrin saturation can say something about how available iron is.

Good to know: these results are not a diagnosis. They can offer insight into your iron status, but their meaning depends on your whole situation. A doctor can help you place the values in the right context.

This test requires a small blood draw at a certified lab. In the Netherlands you can choose from 650+ sample points spread across the country.

After ordering, you pick a location near you and schedule a moment that suits you. The draw itself usually takes only a few minutes, and you do not need a referral from your GP.

An iron test can be valuable at different moments, for example:

• with fatigue or low energy, when you want to measure your iron level
• after a period of heavy blood loss, such as strong periods
• when switching to a plant-based or vegetarian eating pattern
• when you want to check your iron status during a wish to conceive or pregnancy

Some women choose to measure now and then to stay informed about their values. Whether that makes sense for you is something you can discuss with your GP.

Your result shows each value together with a reference range and a short explanation. What counts as usual can vary slightly by laboratory and depends, among other things, on factors such as your age and situation.

A value below or above the range can mean different things. A low ferritin sometimes fits with a depleted store, while other values can point to how your body transports iron. The whole says more than each value on its own, and the doctor helps you interpret it.

Your results are usually in your Lunarahealth account within 2 working days of the blood draw, often the next day. Some markers take longer. Each value is shown clearly with a reference range and an explanation, so you understand what you see.

Every blood test result includes a professional assessment from a BIG-registered doctor. For treatment decisions, discuss your results with your GP.