Vitamin and Iron Panel
Iron status (ferritin, iron, transferrin) and vitamin D — eating a lot less also means taking in fewer nutrients.
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Included Markers
5 markersIron (Serum), Transferrin Saturation, Vitamin D (25-OH), Ferritin, Transferrin
A panel measuring iron status (Ferritin, Iron, Transferrin, Transferrin Saturation) and Vitamin D. Together, these markers provide insight into your nutritional status regarding iron and vitamin D levels.
Why this test?
Iron and Vitamin D are nutrients that play a role in many body functions, from energy levels and immune function to bone health. Measuring multiple iron-related markers (not just one) gives a more nuanced view of iron status, while Vitamin D is a commonly checked nutrient, especially in regions with limited sunlight.
Who is this test for?
This test may be relevant for adults who want insight into their iron and vitamin D levels. It can be useful for those experiencing fatigue or low energy, for those who follow a restricted diet, or for anyone whose healthcare provider has suggested checking these values.
What is tested?
- Ferritin: reflects your body's iron stores. Low ferritin may indicate depleted iron reserves.
- Iron (Serum): the amount of iron circulating in the blood at the time of the test.
- Transferrin: a protein that transports iron in the blood. Its level can help indicate whether the body is requesting more iron.
- Transferrin Saturation: the percentage of transferrin that is carrying iron. Helps assess how much of the iron transport capacity is being used.
- Vitamin D: a vitamin involved in bone health, immune function, and other processes. Levels can be lower in seasons with less sunlight.
What can this test tell you?
The results may indicate whether your iron stores and vitamin D levels fall within expected ranges. Low ferritin with low transferrin saturation, for example, could suggest that iron reserves are running low. Vitamin D levels outside the reference range are common, particularly in the Netherlands during autumn and winter months.
How is the sample collected?
A blood sample is drawn at a certified sample point (afnamepunt). There are 700+ locations across the Netherlands. After placing your order, you can select a location and time that suits you.
When is this test useful?
This test may be useful when you want to check your iron and vitamin D levels, for example if you have been feeling tired, if you follow a vegetarian or limited diet, or simply as part of a general health check.
What do the results mean?
Results are presented with reference ranges for each marker. Iron-related values should be looked at together for the most informative picture. A healthcare provider can help you understand what the results may mean and whether any adjustments to diet or supplementation could be considered.
What happens after the results?
Your results are available in your personal dashboard. If values fall outside the reference range, or if you would like guidance on diet or supplementation, discussing the results with your healthcare provider is recommended.
Frequently Asked Questions
Fasting is not strictly required, but testing in the morning before eating may provide more consistent iron results. Discuss timing with your healthcare provider.
From order to report in 4 steps
No waiting, no referral. Just order and go.
Choose your test
Choose your baseline test or follow-up, or build a custom test.
Receive your lab referral
You'll receive an email from ZorgDomein with a barcode within 1 business day. Orders placed outside office hours are processed from the next business day.
Get tested at a lab near you
Show the barcode on your phone and bring a valid ID. Done in under 15 minutes.
Receive your report from the doctor
A BIG-registered physician reviews your results and writes a personal report. On your dashboard within a few business days.
Choose your test
Choose your baseline test or follow-up, or build a custom test.
Receive your lab referral
You'll receive an email from ZorgDomein with a barcode within 1 business day. Orders placed outside office hours are processed from the next business day.
Get tested at a lab near you
Show the barcode on your phone and bring a valid ID. Done in under 15 minutes.
Receive your report from the doctor
A BIG-registered physician reviews your results and writes a personal report. On your dashboard within a few business days.
Always a location near you
With 700+ certified phlebotomy points across the Netherlands.
What We Test
This test includes 5 biomarkers for a clear picture of your health.
| No. | Biomarker | Unit | Turnaround |
|---|---|---|---|
| 01 | Iron (Serum) Serum iron measures the amount of circulating iron in your blood. Iron is essential for haemoglobin production, oxygen transport, and energy metabolism throughout the body. | umol/l | 5 days |
| 02 | Transferrin Saturation Transferrin saturation measures the percentage of the iron-transport protein transferrin that is occupied by iron. It is a key indicator of your body's iron status and helps distinguish between different causes of iron-related disorders. | % | — |
| 03 | Vitamin D (25-OH) Vitamin D is a fat-soluble vitamin. Its main job is the absorption of calcium and phosphate from the gut. That makes it decisive for bone metabolism. The skin produces it under the influence of sunlight. Food and supplements supply a smaller share. | nmol/l | 3 days |
| 04 | Ferritin Ferritin is a protein that stores iron, so your ferritin level shows how large your iron reserve is. Serum iron only measures how much iron is circulating in your blood at that moment; ferritin describes the reserve behind it. That reserve empties before your haemoglobin falls, so a low ferritin can already cause symptoms while your blood count still looks normal. Ferritin also rises with inflammation, infection and liver strain, which is why it can only be read properly alongside a CRP. Commonly used reference values are 30 to 400 µg/l for men and 15 to 150 µg/l for women, but your own laboratory report is what counts. | ug/l | 2 days |
| 05 | Transferrin Transferrin is the main protein responsible for transporting iron in the blood. It carries iron from the gut and storage sites to cells that need it, including bone marrow for red blood cell production. | g/l | 2 days |
| Your result arrives once the slowest test is finished: 5 days. This is indicative; turnaround varies per laboratory. | |||
Preparation
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Been ill? Wait a little
RequiredHad a fever, an infection or a vaccination in the past 2 weeks? Wait with the draw until you are fully recovered. These values react to inflammation and would give a distorted picture.
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Preferably fasting
RecommendedComing fasting gives a slightly cleaner value, but it is not required. If it suits you, eat nothing from 22:00 the evening before and drink only water.
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Preferably in the morning
RecommendedA morning draw makes this value easiest to compare with its reference range. Plan the draw before 10:00 if you can.
- Water is always fine. Drink as usual beforehand, it makes the draw easier.
- Take your usual medication, unless your own doctor told you otherwise.
Extend this panel
Tests from the same field, run on the same sample. Same draw, no second appointment.
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