pTau-181 Alzheimer’s Risk Test Kit
A specialist venous blood test for adults aged 55–80 with memory or thinking concerns.
pTau-181 Alzheimer’s Risk Test Kit
Home Nurse Visit (Telephone Booking)
Collect your sample easily from home
pTau-181 Alzheimer’s Risk Test Kit
Home Nurse Visit (Telephone Booking)
pTau-181 Alzheimer’s Risk Test Kit
A specialist venous blood test for adults aged 55–80 with memory or thinking concerns.
£365.00
Includes FREE Home Nurse Visit!
When your memory or thinking feels different, it is natural to want clearer information about what to investigate next. This test measures pTau-181, a protein in the blood associated with the amyloid changes seen in Alzheimer’s disease.
Designed for adults aged 55–80 with cognitive concerns, the test can help a healthcare professional assess whether Alzheimer’s-related amyloid changes are unlikely to explain your symptoms. It cannot diagnose Alzheimer’s disease or predict whether you will develop it in the future.
Your sample is analysed using the Roche Elecsys® pTau181 assay in a UKAS-accredited laboratory, with secure digital results that you can share with your GP or specialist.
Only for professional collection. This test includes our Home Nurse Visit (Telephone Booking) service at no additional charge!
This service is intended for adults aged 55–80 with memory or thinking concerns. It is not a general screening test, including for people concerned only because of family history. Sudden confusion or a rapid change in mental state needs urgent medical help.
What the pTau-181 Alzheimer’s Risk test is for
The test measures phosphorylated tau at position 181, shortened to pTau-181, in the plasma portion of your blood. Tau is a protein normally found in nerve cells. When Alzheimer’s-related amyloid changes are present in the brain, pTau-181 levels in the blood can rise.
The Roche Elecsys® pTau181 assay is primarily designed as a rule-out test. A negative result makes Alzheimer’s-related amyloid changes less likely to explain your symptoms. A positive result does not diagnose Alzheimer’s disease and means that further clinical assessment may be needed.
The result is one part of a wider assessment. Your clinician should also consider your symptoms, medical history, medicines and any other investigations.
Small changes,
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real data,
compound fast
Find out where to start...
Need more details?
Learn how the self collection process works, what's in the kit, and your options for clinic and home nurses visits.
How this works ›Why take the pTau-181 Alzheimer’s Risk test?
Memory, concentration and thinking can change for many reasons. An objective biomarker result may help you and your clinician decide what to explore next.
Add biological context. Bring an objective laboratory result into the conversation about your symptoms.
Guide the next step. Help your clinician decide whether Alzheimer’s-related changes need further investigation or whether other explanations should be explored.
Access specialist testing. Begin with a professionally collected blood sample rather than a brain scan or lumbar puncture. Further tests may still be needed.
- are aged 55–80 and have noticed persistent changes in memory, concentration or thinking
- are already undergoing assessment and want additional information to help guide further investigation
- have discussed your concerns with a healthcare professional who considers biomarker testing appropriate
- want an objective laboratory result to discuss with your clinician
Order your pTau-181 Alzheimer’s Risk test and get the insights you need to feel your best.
Medical disclaimer: This test provides health information and is not a substitute for clinical assessment, diagnosis or treatment. Results should be considered alongside your symptoms, medical history and any medicines you take. If you are concerned about your results or your health, speak to a qualified healthcare professional. For urgent concerns, contact NHS 111, your GP, or call 999 in an emergency.
Expert Analysis In An Accredited Laboratory
Once your sample reaches the UKAS-accredited lab, the magic begins. But this isn't simple science – we insist on state-of-the-art automated technology to ensure your results are processed with unmatched accuracy and efficiency.
- UKCA marked test kits for full regulatory compliance.
- IVDD certified diagnostics for total quality reassurance.
- Medically led UKAS accredited laboratory testing for accurate results.
Dr. Kate Bishop
Chief Scientific Officer
"All testing is conducted by healthcare professionals in a medically-led laboratory. Accredited lab testing is the best way to be confident that your test results are accurate. Get tested now for complete reassurance."
Delivery and results
The pTau-181 Alzheimer’s Risk test includes our Home Nurse Visit (Telephone Booking) service for sample collection.
offers you the most convenient and stress-free way to get tested. Your test also includes free 24 hour tracked sample return to the laboratory.
1. Get Blood Drawn
2. Post Your Samples
3. Get Your Results
pTau-181 is a form of tau protein associated with Alzheimer’s-related amyloid changes. The result helps assess whether those changes are less likely to explain your symptoms when considered alongside a clinical assessment.
| Test | Result | Reference | Status |
|---|---|---|---|
| pTau-181 | 5.123pg/mL | 0.000 - 0.934 | High |
5.123 pTau-181 is a form of tau protein associated with Alzheimer’s-related amyloid changes. The result helps assess whether those changes are less likely to explain your symptoms when considered alongside a clinical assessment. | |||
Traffic Light System Instantly see which health markers are in a healthy range (green), borderline (yellow), or need attention (red).
Detailed Explanations Each marker includes an overview of its role in your body, what it means to have high or low levels, and actionable tips to improve.
Tracked Changes See how your health markers have changed over time, track your progress, and optimise your health.
Expert Guidance We don't just hand over data – we empower you with insights to make informed decisions about your health.
What happens after your results?
Testing shows where you are today. Prevent helps you focus on where you want to be.
Using your test results, metrics and symptoms, you can gain further insights to achieve your health goals.
Connect with expert medical partners focused on helping you achieve better health.
We are highly selective over who we choose to work with, so you can be confident you are in good hands.
What people say about this test
Ailis
May Wilson
Lucy Donald
Frequently Asked Questions
This service is intended for adults aged 55–80 with memory or thinking concerns. It is not intended as general screening for people without symptoms, including those concerned only because of family history.
No. It is designed primarily to help rule out Alzheimer’s-related amyloid changes as one part of a wider assessment.
No. A negative result makes Alzheimer’s-related amyloid changes less likely to explain your symptoms, but it cannot completely exclude Alzheimer’s disease or other causes of cognitive change.
Laboratory analysis usually takes 2–5 days after your sample arrives. Allow additional time for sample collection, transport and results reporting.
No. It requires a venous blood sample collected by a trained nurse or phlebotomist.
A positive result does not diagnose Alzheimer’s disease. Discuss it with your GP or specialist, who can decide whether further assessment, imaging or other tests are appropriate.
No. The test does not predict your lifetime risk and does not test for every type of dementia.
Home test kits contain full instructions and everything you need to safely collect and return your sample. Please see the following details relating to this test below:
- Venous blood collected by a trained nurse or phlebotomist.
We also have a guide on how to collect a high quality sample which you may find useful.
The Vitall pTau-181 Alzheimer’s Risk test is available online for just £365.00. The price includes a FREE Home Nurse Visit.
Buying the best pTau-181 Alzheimer’s Risk test online in the UK with Vitall ensures high quality results from an accredited laboratory.
Take control of your health today with one of Vitall’s home blood tests.
Articles About pTau-181 Alzheimer’s Risk Testing
View all articles ›Clinical review
Dr. Shahzaib Ahmad MBBS, BSc, MRCP, FRCA, FFICM
Clinical Supervisor - Vitall|GMC 7495062|Profile
Reviewed on 18/09/2026
Next review due 18/09/2027
Review focus: Blood biomarkers, laboratory testing methodology, and biochemical interpretation.
£365.00
