Doctor led nutrition testing from Kingston
Vitamin and Nutrition Blood Tests UK
A considered collection of home vitamin blood tests for vitamin D, B12, folate, iron, minerals and omega 3 status.
Symptoms do not prove a deficiency. Tiredness, hair changes, altered concentration, muscle discomfort and dietary concerns may have nutritional and non nutritional causes. A home blood test can provide selected laboratory information, but it cannot establish the diagnosis or the reason for an abnormal result by itself.
Choose according to the question
Use the smallest panel that can meaningfully change the next step
A focused vitamin D blood test may be enough when vitamin D is the defined question. A B12, folate and vitamin D panel may suit a more specific nutritional concern. Iron testing answers a different question, while omega 3 testing describes selected fatty acid exposure rather than general vitamin status.
A broader panel may be proportionate when several included markers are relevant. It should not be chosen simply because it contains more measurements.
A single marker route for a defined vitamin D question.
B12, folate and vitamin D in one focused panel.
Selected vitamins, minerals and iron where the full panel is relevant.
Ferritin and related iron measurements for a specific iron question.
Fatty acid status for nutritional context, not cardiovascular diagnosis.
Chest pain, severe breathlessness, fainting, confusion, new weakness or numbness, black or bloody stools, rapidly worsening illness or severe symptoms in pregnancy require prompt medical assessment.
A more useful way to test
Start with diet, symptoms, medicines and supplements
The same result can mean different things in different people. Dietary restriction, digestive conditions, previous surgery, pregnancy, medicines, inflammation, recent high dose supplements and previous results all affect the value of testing and the next step.
It’s Me & You Clinic collection
Home vitamin and nutrition blood tests
These five product routes preserve the intended scope of the supplied collection while using It’s Me & You Clinic links, imagery and completely rewritten guidance.
B12, folate and vitamin D
Essential Vitamins Blood Test Home Kit UK
A concise three marker route when diet, absorption, medicine use, previous deficiency or limited sun exposure creates a defined nutritional question.
- Focus
- Vitamin B12, serum folate and 25 hydroxyvitamin D
- May be relevant when
- A focused vitamin question rather than a broad nutritional screen
- Important limit
- A low result does not identify the cause, and normal results do not exclude other explanations
Broader nutritional overview
Vitamin Deficiency Blood Test Home Kit UK
A wider vitamin, mineral and iron panel for people who have checked the complete marker list and need more than a focused single nutrient route.
- Focus
- The vitamin, mineral and iron measurements stated on the product page
- May be relevant when
- Several relevant dietary, absorption or previous deficiency questions
- Important limit
- More biomarkers may create incidental findings and do not provide a complete medical assessment
Focused vitamin D status
Vitamin D Blood Test Home Kit UK
A single marker option when vitamin D is the defined question, including previous deficiency, limited sun exposure or clinician advised monitoring.
- Focus
- 25 hydroxyvitamin D
- May be relevant when
- A specific vitamin D question
- Important limit
- Routine testing is not necessary for everyone, and the result does not explain every symptom
Iron stores and transport
Iron Profile Blood Test Home Kit UK
A focused iron route where tiredness, pallor, breathlessness, heavy periods, blood loss or restricted dietary intake creates a clear question.
- Focus
- Ferritin and the related iron measurements stated on the product page
- May be relevant when
- A specific question about depleted iron stores or iron balance
- Important limit
- Ferritin may rise with inflammation and a low result does not explain why iron is low
Fatty acid balance
Omega 3 and Fatty Acid Blood Test Home Kit UK
A nutritional fatty acid route reporting the Omega 3 Index and the measured omega 6 to omega 3 balance according to the laboratory method.
- Focus
- Omega 3 Index and the reported omega 6 to omega 3 balance
- May be relevant when
- A defined question about sustained dietary or supplement exposure
- Important limit
- The test does not diagnose cardiovascular disease, inflammation or supplement suitability
Compare before ordering
Which nutrition blood test answers which question?
| Test | Main focus | May be relevant when | Important limit |
|---|---|---|---|
| Essential Vitamins Blood Test | Vitamin B12, serum folate and 25 hydroxyvitamin D | A focused vitamin question rather than a broad nutritional screen | A low result does not identify the cause, and normal results do not exclude other explanations |
| Vitamins, Minerals and Iron Test | The vitamin, mineral and iron measurements stated on the product page | Several relevant dietary, absorption or previous deficiency questions | More biomarkers may create incidental findings and do not provide a complete medical assessment |
| Vitamin D Blood Test | 25 hydroxyvitamin D | A specific vitamin D question | Routine testing is not necessary for everyone, and the result does not explain every symptom |
| Iron Profile Blood Test | Ferritin and the related iron measurements stated on the product page | A specific question about depleted iron stores or iron balance | Ferritin may rise with inflammation and a low result does not explain why iron is low |
| Omega 3 and Fatty Acid Test | Omega 3 Index and the reported omega 6 to omega 3 balance | A defined question about sustained dietary or supplement exposure | The test does not diagnose cardiovascular disease, inflammation or supplement suitability |
Plain English biomarker guide
What selected nutritional markers may add to the picture
A result becomes meaningful only when it is considered with symptoms, medicines, supplement use, diet, previous tests and the laboratory reference interval.
Vitamin B12
Vitamin B12 contributes to blood formation and neurological function. A low result may relate to diet, absorption, medicines, autoimmune gastritis or other causes. Total B12 does not always reflect functional status perfectly.
Serum folate
Serum folate provides selected information about folate status and may be influenced by recent intake and supplements. Folate should not be interpreted without considering vitamin B12.
25 hydroxyvitamin D
This is the usual blood marker for vitamin D status. Season, sun exposure, skin pigmentation, supplements, absorption and assay method may affect the result.
Ferritin and iron measurements
Ferritin reflects stored iron, while related measurements provide context about transport and availability. Inflammation may raise ferritin, and low iron still requires investigation of the cause.
Omega 3 Index
The Omega 3 Index reflects selected long chain omega 3 fatty acids according to the laboratory method. It describes nutritional exposure and does not diagnose heart disease or determine that a supplement is necessary.
Mineral measurements
The usefulness of a mineral result depends on the precise marker, sample method and clinical question. A broad nutrition panel should be reviewed marker by marker.
Symptoms and context
When people consider vitamin and nutrition testing
May relate to iron, B12, folate, vitamin D or many non nutritional causes.
Relevant where animal products, fortified foods or key nutrients may be limited.
Some gastrointestinal conditions, surgery and medicines can affect nutrient status.
Vitamin D may be relevant, but calcium, activity, medicines and other factors also matter.
These symptoms are non specific and may have hormonal, dermatological or nutritional causes.
Repeat testing may be useful where a clinician has advised review of a previous result.
Symptoms should not be used to diagnose a deficiency without appropriate context. Persistent or worsening symptoms deserve clinical assessment.
Supplements and preparation
Improve the usefulness of the result before you collect
Include the name, dose, frequency and timing of iron, vitamin D, B12, folate, omega 3 and multivitamin products.
Continue prescribed medicines and supplements unless the clinician responsible for your care advises otherwise.
Preparation differs between products. Follow the current instructions supplied with the individual kit.
Inflammation and acute illness can affect ferritin and other laboratory measurements.
Recent restriction, weight loss, fortified foods and new supplements can affect interpretation.
Decide who will review a clearly abnormal or unexpected result before ordering.
From order to result
How home blood testing works
Define the nutritional question and compare the exact marker lists.
Read timing, fasting, medicine, supplement and collection instructions.
Use the supplied equipment and follow every collection step.
Package the sample and use the specified return route promptly.
Consider the report with symptoms and arrange suitable follow up.
Laboratory analysis and reporting
A defined pathway after the sample leaves your home
Home collection is only the first stage. The sample must be identified, accepted, analysed using the method specified for the selected markers and reported through the relevant secure pathway.
Laboratory, accreditation, sample stability and reporting details can differ between products. Check the current individual test specification. Where UKAS accreditation or a CQC registered diagnostic pathway is stated, it should be confirmed for that specific test rather than assumed across the whole collection.
Clinic address
Ground floor
Siddeley House
50 Canbury Park Road
Kingston upon Thames
KT2 6LX
Doctor led care in Kingston
Support when choosing a test needs more individual judgement
It’s Me & You Clinic is led by Dr Laura Geige and is located around five minutes from Kingston station. The clinic is convenient for Kingston, Norbiton, Surbiton, Richmond, Hampton Wick, New Malden and neighbouring Surrey areas.
The Rotunda, Bentall Centre, Fenwick, cafés and Kingston riverside are nearby. Drivers can use central off street parking serving the Bentall Centre and the wider town centre.
Medical and editorial review
Nutrition, medical accuracy and patient pathway review
The page has been reviewed for nutrient related context, symptom boundaries, supplement safety, laboratory limitations, urgent symptoms and responsible follow up.
Nutrition review
Dr Rimas Geiga
Reviewed vitamin D, vitamin B12, folate, iron, omega 3 and supplement related information, including responsible interpretation and limitations.
View professional profile
Medical oversight
Dr Laura Geige
Reviewed medical boundaries, urgent symptom escalation, clinic information and the distinction between laboratory context and diagnosis.
View professional profile
Patient pathways
Veronika Matutyte
Reviewed collection, laboratory pathway wording, quality governance, diagnostic limitations and appropriate follow up communication.
View professional profileMedical and editorial review date: 4 August 2026. General website information is educational and does not replace individual medical advice.
UK research and further reading
Selected university and medical journal sources
Clinical discussion of symptoms, iron assessment, self care and the importance of addressing the underlying cause.
A systematic review illustrating that vitamin B12 deficiency management depends on evidence, cause and treatment context.
Research discussing limitations of total vitamin B12 and the relevance of alternative biochemical markers.
A clinical article explaining why vitamin D testing should be linked to a defined indication rather than used indiscriminately.
A laboratory perspective on analytical variability and the challenges of vitamin D measurement.
A meta analysis of randomised trials demonstrating why omega 3 biomarkers and supplement decisions should not be confused with a cardiovascular diagnosis.
Frequently asked questions
Vitamin and nutrition blood tests
Which vitamin blood test should I choose?
Choose according to the question you want to answer. A focused vitamin D test reports one marker. The essential vitamins panel combines vitamin B12, folate and vitamin D. A broader panel may be appropriate when several included markers are genuinely relevant.
Can I test vitamin levels at home?
Yes. These kits use a home collected blood sample that is returned for laboratory analysis. They are not instant self read tests.
Do vitamin blood tests diagnose the cause of tiredness?
No. Tiredness may relate to sleep, stress, medicines, infection, anaemia, thyroid function, mental health or many other causes. Results must be considered with the wider history.
What does the vitamin D test measure?
It measures 25 hydroxyvitamin D, the standard laboratory marker used to assess vitamin D status in most people.
Can a normal vitamin B12 result exclude deficiency?
Not always. Interpretation can depend on symptoms, medicines, diet, absorption, previous treatment and the assay used. Further testing may be appropriate in selected cases.
Can I take the test while using supplements?
Yes, but record all supplements and recent high dose courses because they may affect the result. Do not stop prescribed supplements without advice.
Do I need to fast?
Preparation differs between products. Follow the current instructions supplied with the individual home kit rather than applying one rule to the whole collection.
Is ferritin the same as iron?
No. Ferritin reflects stored iron, while serum iron and transport markers provide different information. Ferritin may also rise during inflammation.
What is an Omega 3 Index test?
It reports a laboratory fatty acid measure related to long chain omega 3 status. It provides nutritional context and does not diagnose cardiovascular disease or calculate cardiovascular risk.
Can the Omega 3 result tell me to take fish oil?
No. It may reflect current diet and supplement exposure, but it cannot determine that a supplement is necessary, effective or safe for an individual.
What should I do with an abnormal result?
Read the laboratory commentary and discuss persistent, unexpected or clearly abnormal results with a GP or another appropriate healthcare professional.
When should I seek urgent medical help?
Do not wait for home testing if you have severe weakness, fainting, chest pain, marked breathlessness, confusion, new neurological symptoms, black or bloody stools or rapidly worsening illness.
Choose with clarity
Test a defined nutritional question and understand what the result cannot tell you
Compare the five home testing routes when laboratory context is appropriate, or contact the doctor led Kingston clinic when symptoms, medicines or previous results make the choice less straightforward.
These tests provide selected laboratory information and do not replace medical assessment, diagnosis, emergency care or treatment.
