At home ferritin and iron profile blood test
Home Iron Blood Test UK | Ferritin & Iron Profile
A five marker home blood test assessing iron stores, circulating iron and iron transport.
The panel measures ferritin, serum iron, transferrin, TIBC and transferrin saturation. It can provide useful context where low iron stores or iron overload is suspected, but it cannot diagnose anaemia or establish the underlying cause by itself.
The panel does not include haemoglobin, red blood cell indices or a full blood count. These are required to determine whether anaemia is present and how severe it may be.
Iron treatment should follow appropriate assessment because both iron deficiency and iron overload can be harmful. Do not stop prescribed iron or begin high dose supplementation without clinical advice.
Quality and compliance
Home testing supported by UK clinical standards
What this iron profile measures
| Health area | Biomarkers | What they may help show |
|---|---|---|
| Stored iron | Ferritin | The principal marker used to estimate iron stores, with important inflammation limitations. |
| Circulating iron | Serum iron | The amount of iron circulating at the time of collection. |
| Iron transport | Transferrin and TIBC | The protein carrying iron and the blood's estimated total binding capacity. |
| Iron availability | Transferrin saturation | The percentage of available transferrin binding sites occupied by iron. |
Who may consider this test?
This panel may be considered by adults who want to review selected iron markers in the context of:
- Persistent tiredness, weakness or reduced exercise tolerance
- Breathlessness, palpitations, headaches or restless legs
- Heavy menstrual bleeding or another source of blood loss
- Pregnancy planning or previous low iron stores
- Frequent blood donation
- A vegan, vegetarian or otherwise restrictive diet
- Gastrointestinal disease, bariatric surgery or possible malabsorption
- A family history of hereditary haemochromatosis
- Monitoring requested by a GP or another qualified clinician
Symptoms associated with iron imbalance are non specific. A normal profile does not exclude every medical cause of tiredness or breathlessness.
How the home iron blood test works
Prepare consistently
Follow the 12 hour fasting instruction and record supplements, medicines and recent treatment.
Collect and return
Collect capillary blood into the supplied microtainer and return it using the provided packaging.
Review the complete pattern
Interpret ferritin, serum iron, transferrin, TIBC and TSAT together rather than relying on one value.
Preparing for the test
| Preparation | What to do |
|---|---|
| Fasting | Follow the kit instruction to fast for 12 hours. Have plain water only and collect in the morning where possible. |
| Iron products | Follow the product instruction about non prescribed iron. Do not stop prescribed tablets, infusions or injections without medical advice. |
| Biotin | Record high dose biotin and follow the laboratory instruction about whether it should be paused. |
| Medicines | Record chloramphenicol, chemotherapy, monoclonal antibodies and other prescribed medicines. |
| Hormone treatment | Record the contraceptive pill, oestrogen treatment and pregnancy because they can affect transferrin and TIBC. |
| Recent treatment | Record blood transfusion, iron infusion, iron injection or recent oral iron treatment. |
| Inflammation or infection | Ferritin can rise during inflammation. A clinician may request CRP, liver tests or repeat testing. |
Common iron profile patterns
These simplified examples support interpretation and are not diagnoses.
| Possible pattern | Markers that may be seen | Important qualification |
|---|---|---|
| Depleted iron stores | Low ferritin, low TSAT, lower serum iron and higher transferrin or TIBC. | A full blood count is required to determine whether anaemia is present. |
| Inflammation related pattern | Normal or high ferritin with low serum iron and low TSAT, often with low or normal transferrin. | Ferritin may be raised by inflammation and can mask iron deficiency. |
| Possible iron overload | Raised TSAT and serum iron with low or normal TIBC, sometimes with raised ferritin. | Repeat fasting studies, liver tests and HFE genetic assessment may be required. |
| Recent supplementation | Temporarily raised serum iron or TSAT, with ferritin depending on longer term stores. | Record the dose and timing before collection. |
| Oestrogen or pregnancy effect | Higher transferrin or TIBC, with interpretation depending on ferritin and TSAT. | Pregnancy requires dedicated reference intervals and clinical oversight. |
Biomarkers and result interpretation
Select each marker to read what it measures, preparation guidance and how low, normal, high or critical results may be considered.
Transferrin saturation
Transferrin saturation, often shortened to TSAT, estimates the percentage of iron binding sites on transferrin that are occupied. It is calculated from serum iron and TIBC.
Low TSAT may support iron deficiency, while a persistently raised result may require assessment for iron overload. It should be interpreted with ferritin, serum iron, transferrin, inflammation, liver health and supplement use.
Follow the supplied 12 hour fasting instruction and collect in the morning where possible. Plain water is normally allowed. Record iron tablets, multivitamins, injections, infusions, recent transfusions, biotin and hormone treatment. Do not stop prescribed treatment without advice.
How to understand this result
| Result | What it may mean | What to do |
|---|---|---|
| Low | May occur with iron deficiency, chronic blood loss, poor absorption, inflammation or increased iron requirements. | Discuss the complete pattern with a GP. A full blood count may also be required. |
| Normal | Falls within the laboratory interval. | Interpret with ferritin and the other iron studies. |
| High | May occur after supplementation, iron treatment, transfusion, hereditary haemochromatosis, liver disease or other causes. | Discuss a persistent or unexplained result with a clinician. |
| Critical high | A very high or rapidly rising result may require prompt assessment, especially with a raised ferritin or liver abnormalities. | Follow the laboratory's urgent advice. |
Ferritin
Ferritin is the principal laboratory marker used to estimate stored iron. A low result strongly supports depleted iron stores.
Ferritin is also an acute phase protein and may rise during inflammation, infection, liver disease, obesity and other conditions. A normal or high result can therefore sometimes mask iron deficiency.
Follow the supplied 12 hour fasting instruction and collect in the morning where possible. Plain water is normally allowed. Record iron tablets, multivitamins, injections, infusions, recent transfusions, biotin and hormone treatment. Do not stop prescribed treatment without advice.
How to understand this result
| Result | What it may mean | What to do |
|---|---|---|
| Critical low | A very low result indicates markedly depleted iron stores and may coexist with significant anaemia or ongoing blood loss. | Arrange prompt GP assessment and a full blood count. |
| Low | NICE guidance states that ferritin below 30 micrograms per litre confirms iron deficiency in adults. | Discuss the cause, including bleeding, diet, donation and malabsorption, with a clinician. |
| Normal | Falls within the reference interval. | Consider symptoms, inflammation, TSAT and a full blood count where available. |
| High | May occur with inflammation, infection, liver disease, alcohol use, metabolic conditions, iron overload, malignancy or supplementation. | Do not assume haemochromatosis from ferritin alone. Discuss the complete pattern. |
| Critical high | A markedly raised result may require urgent assessment depending on symptoms, liver tests and the laboratory threshold. | Follow the report's escalation advice. |
Serum iron
Serum iron measures iron circulating in the blood at the time of collection. Iron is needed to produce haemoglobin, but the serum result changes with meals, time of day, supplements and illness.
It should not be used alone to diagnose iron deficiency, iron deficiency anaemia or haemochromatosis.
Follow the supplied 12 hour fasting instruction and collect in the morning where possible. Plain water is normally allowed. Record iron tablets, multivitamins, injections, infusions, recent transfusions, biotin and hormone treatment. Do not stop prescribed treatment without advice.
How to understand this result
| Result | What it may mean | What to do |
|---|---|---|
| Low | May occur with iron deficiency, inflammation, chronic illness, blood loss or poor absorption. | Interpret with ferritin, transferrin, TIBC, TSAT and a full blood count. |
| Normal | Falls within the laboratory interval. | A normal serum iron result does not exclude depleted iron stores. |
| High | May reflect recent supplements, iron treatment, transfusion, haemolysis, liver disease or iron overload. | Discuss an unexpected result with a clinician. |
| Critical high | Very high circulating iron may occur with overdose or acute iron toxicity. | Seek immediate medical advice where overdose is possible. |
Transferrin
Transferrin is produced mainly by the liver and transports iron through the blood. The concentration often increases when the body is trying to capture more iron.
Transferrin is affected by pregnancy, oestrogen treatment, inflammation, liver disease, kidney protein loss and nutritional status.
Follow the supplied 12 hour fasting instruction and collect in the morning where possible. Plain water is normally allowed. Record iron tablets, multivitamins, injections, infusions, recent transfusions, biotin and hormone treatment. Do not stop prescribed treatment without advice.
How to understand this result
| Result | What it may mean | What to do |
|---|---|---|
| Low | May occur with inflammation, liver disease, poor nutrition, kidney protein loss or iron overload. | Interpret with ferritin, serum iron and TSAT. |
| Normal | Falls within the laboratory reference interval. | Review it as part of the full iron profile. |
| High | Often occurs when iron stores are depleted and may also be influenced by pregnancy or oestrogen containing treatment. | Discuss the result if ferritin or TSAT is also low. |
Total iron binding capacity
Total iron binding capacity, known as TIBC, estimates the total amount of iron that blood proteins could bind. It mainly reflects transferrin.
TIBC may be measured directly or calculated using serum iron and UIBC. UIBC represents the unused iron binding capacity and may not appear as a separate reported biomarker.
The supplier description refers to UIBC, while the reported biomarker list shows TIBC. UIBC may be used within the TIBC calculation but is not necessarily displayed as a separate result.
Follow the supplied 12 hour fasting instruction and collect in the morning where possible. Plain water is normally allowed. Record iron tablets, multivitamins, injections, infusions, recent transfusions, biotin and hormone treatment. Do not stop prescribed treatment without advice.
How to understand this result
| Result | What it may mean | What to do |
|---|---|---|
| Low | May occur with inflammation, liver disease, poor nutrition, kidney disease or iron overload. | Interpret with ferritin, serum iron, transferrin and TSAT. |
| Normal | Falls within the laboratory reference interval. | A normal TIBC does not by itself establish that iron status is normal. |
| High | Commonly occurs when iron stores are depleted and may also be influenced by pregnancy or oestrogen treatment. | Discuss the complete profile with a GP if ferritin or TSAT is low. |
Evidence and content standards
How this product information was fact checked
This page was prepared from the supplied five marker iron profile specification and checked against current NICE, NHS and UK laboratory guidance on ferritin, serum iron, transferrin, TIBC, transferrin saturation, iron deficiency and haemochromatosis.
Clinical accountability
Fact checked, medically reviewed and editorially overseen
The review structure separates nutritional and evidence verification, medical safety review and patient facing editorial oversight. The page does not replace an individual assessment by a GP, haematology professional or gastroenterology service.
Dr Rimas Geiga
Medical Doctor, Nutritional Sciences Adviser and Healthy Ageing Expert
Checked iron nutrition, ferritin, supplementation, dietary context and the evidence based limitations of individual iron markers.
View professional profileVeronika Matutyte
Medical Doctor and Healthcare Management Expert
Reviewed anaemia limitations, blood loss and urgent symptom guidance, medicine considerations and the safety of the home testing pathway.
View professional profileDr Laura Geige
Medical Director, Senior Practitioner and Skin Expert
Reviewed patient facing clarity, responsible medical claims, escalation language and the separation of test information from personalised diagnosis.
View professional profileAuthoritative references
UK iron studies and anaemia information
View NICE, NHS and UK laboratory sources
- NICE iron deficiency investigations
- NHS TIBC and transferrin test information
- NHS iron deficiency anaemia information
- NHS haemochromatosis diagnosis
- Sheffield Laboratory Medicine iron profile information
- NHS iron, transferrin and transferrin saturation information
- UKAS medical laboratory accreditation
- CQC diagnostic and screening services guidance
Search led questions
Home iron blood test FAQs
Can I test my iron levels at home?
Yes. This kit uses a capillary blood sample collected at home and returned for laboratory analysis. It measures five iron related markers rather than providing an instant home reading.
What does a full iron profile blood test check?
This panel checks ferritin, serum iron, transferrin, total iron binding capacity and transferrin saturation. Together they provide information about iron stores, circulating iron and iron transport.
Does this test diagnose iron deficiency anaemia?
No. Anaemia is diagnosed using haemoglobin and red blood cell measurements from a full blood count, which are not included. The profile can support assessment of iron status but cannot diagnose anaemia by itself.
What is the difference between iron and ferritin?
Serum iron measures iron circulating at the time of collection and can vary with meals and time of day. Ferritin is the main marker used to estimate stored iron, although inflammation and liver conditions can raise it.
What ferritin level suggests iron deficiency in the UK?
NICE guidance states that ferritin below 30 micrograms per litre confirms iron deficiency in adults. A higher ferritin does not always exclude deficiency where inflammation or chronic illness is present.
What is transferrin saturation?
Transferrin saturation estimates the percentage of transferrin iron binding sites that are occupied. It is calculated from serum iron and TIBC and can help assess possible deficiency or iron overload.
What is transferrin?
Transferrin is the main protein that transports iron through the blood. It may rise when iron stores are low and may fall with inflammation, liver disease, poor nutrition or iron overload.
What is TIBC?
Total iron binding capacity estimates the total amount of iron that blood proteins could bind and transport. TIBC is often higher in iron deficiency and lower or normal in inflammation or iron overload.
What is UIBC?
Unsaturated iron binding capacity estimates the unused iron binding capacity. Some laboratories calculate TIBC from serum iron plus UIBC, but UIBC may not be reported separately on every result.
Do I need to fast for an iron blood test?
Follow the kit instruction to fast for 12 hours with plain water only. Serum iron and transferrin saturation can vary with meals and time of day, so a morning fasting sample improves consistency.
Should I stop iron supplements before testing?
Follow the kit instruction for non prescribed iron products. Do not stop prescribed iron, injections or infusions without medical advice. Record the dose and timing because supplementation can affect the result.
Can biotin affect an iron test?
High dose biotin, which is vitamin B7, can interfere with some laboratory immunoassays. Follow the kit guidance and ask a clinician before stopping prescribed biotin.
Can the contraceptive pill affect iron results?
Oestrogen containing contraception can alter transferrin and iron binding capacity. Record the exact contraceptive or hormone treatment so the result can be interpreted in context.
Can inflammation affect ferritin?
Yes. Ferritin is an acute phase protein and may rise with infection, inflammation, liver disease, obesity or other conditions. A normal or high ferritin can therefore sometimes mask iron deficiency.
Can a high ferritin result mean haemochromatosis?
Possibly, but high ferritin alone does not diagnose iron overload. Persistent raised transferrin saturation together with raised ferritin may prompt liver tests, repeat fasting iron studies and HFE genetic testing.
Can a normal serum iron result rule out iron deficiency?
No. Serum iron changes during the day and after meals and does not reflect stored iron reliably. Ferritin and the complete pattern are more informative.
Who may be at risk of low iron stores?
Risk can be higher with heavy menstrual bleeding, pregnancy, blood donation, gastrointestinal blood loss, restrictive diets, malabsorption, bariatric surgery, inflammatory disease and increased physiological requirements.
What symptoms can occur with low iron or anaemia?
Possible symptoms include tiredness, weakness, breathlessness, palpitations, headaches, pale skin, reduced exercise tolerance and restless legs. These symptoms are not specific and need wider assessment.
When should low iron symptoms be treated as urgent?
Seek urgent help for chest pain, severe breathlessness, collapse, fainting, vomiting blood, heavy ongoing bleeding, or new black tarry stools not explained by prescribed iron.
Are the laboratories UKAS accredited and CQC registered?
Samples are processed through UKAS accredited laboratories within a CQC registered diagnostic pathway. Collection equipment is UKCA and CE marked and supported by an ISO 13485 quality management framework.
