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Liver Function Test

Liver Function Test

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  • ✔️ Measures ALT, AST, ALP, GGT and bilirubin from home
  • ✔️ Identifies potential liver enzyme abnormalities early
  • ✔️ Processed in a UKAS-accredited laboratory for reliable results
  • ✔️ Suitable for adults with alcohol, obesity or medication risk factors
  • ✔️ Results delivered securely online within 3–5 working days

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What Is a Liver Function Test at Home?

 

Your liver does an enormous amount of work — filtering toxins, producing bile, regulating blood sugar, and metabolising medications, to name just a few of its roles. Yet liver disease often develops silently, with few obvious symptoms until significant damage has already occurred. That is why checking in on your liver health proactively makes a lot of sense. The liver function test at home from YorkTest gives you a straightforward way to assess key liver markers without needing a GP referral or a trip to a clinic. Priced at £59.00, it is a practical option for anyone who wants answers quickly and conveniently. If you are already monitoring other aspects of your health, you might also find our diabetes monitoring range useful alongside this test.

The YorkTest Liver Function Test is a finger-prick blood test kit designed for home use. Once you have collected your sample, you post it to a UKAS-accredited laboratory, and your results are returned to you securely online. It measures several important liver enzymes and proteins that clinicians use to assess how well the liver is functioning.

 

How Does the YorkTest Liver Function Test Work?

 

The test works by analysing specific biomarkers in your blood that reflect liver activity and health. Here is what the process involves:

  • A small finger-prick blood sample is collected using the sterile lancet included in the kit.
  • The blood is applied to a collection card or into a micro-collection tube, depending on the kit format.
  • The sealed sample is posted to the laboratory in the prepaid envelope provided.
  • Laboratory scientists analyse the sample for key liver markers using validated assay methods.
  • Results are made available to you via a secure online portal, typically within 3–5 working days of the lab receiving your sample.

The markers measured include alanine aminotransferase (ALT), aspartate aminotransferase (AST), alkaline phosphatase (ALP), gamma-glutamyl transferase (GGT), and bilirubin. Elevated levels of these enzymes can indicate liver inflammation, bile duct problems, or other hepatic conditions that warrant further investigation.

 

Who Should Consider Using This Liver Test?

 

This test is suitable for adults aged 18 and over. It is particularly relevant if you have one or more risk factors for liver disease, or if you simply want a baseline picture of your liver health. The NHS notes that liver disease is often asymptomatic in its early stages, which is precisely why proactive testing can be so valuable.

  • People who drink alcohol regularly, even within what they consider moderate limits
  • Those with obesity or type 2 diabetes, both of which are associated with non-alcoholic fatty liver disease (NAFLD)
  • Individuals taking long-term medications known to affect the liver, such as statins or methotrexate
  • Anyone with a family history of liver conditions or who has previously had abnormal liver results

 

How Does the YorkTest Liver Test Compare to an NHS Liver Blood Test?

 

Feature YorkTest Liver Function Test NHS Liver Blood Test
Requires GP referral No Usually yes
Sample collection Finger-prick at home Venous blood draw at clinic
Results turnaround 3–5 working days Varies; often 1–2 weeks
Cost £59.00 Free (if referred)
Laboratory accreditation UKAS-accredited lab NHS-accredited lab

 

Is the YorkTest Liver Function Test Clinically Reliable?

 

The liver function test at home from YorkTest is processed in a UKAS-accredited laboratory, meaning the analytical methods meet rigorous quality standards. That said, it is important to understand that this test is a screening tool, not a diagnostic one. If your results are outside the normal reference range, you should follow up with your GP rather than drawing conclusions on your own. Abnormal liver enzymes can have many causes — some benign, some requiring treatment. If you are also managing digestive health concerns, our IBS and cramps range may be worth exploring alongside your liver health journey.

Store the kit at room temperature, away from direct sunlight and heat sources, and use it before the expiry date printed on the packaging. Do not freeze the collection materials.

This product is a diagnostic test kit. Speak to your doctor or pharmacist before using if you have an underlying medical condition or are taking other medicines.

YorkTest Liver Function Test specifications
Treatment category Diagnostic / Health Monitoring
Mechanism of action Finger-prick blood sample analysed for liver enzyme and bilirubin levels in a UKAS-accredited laboratory
Effective for Screening liver health; detecting potential liver enzyme abnormalities
Suitable for Adults aged 18 and over
Active ingredient N/A — diagnostic test kit
Pack sizes 1 test kit
UK classification General Sale / Diagnostic device
Preparation Finger-prick blood collection card / micro-collection tube
Route of administration Finger-prick blood sample (posted to laboratory)

Specifications of YorkTest Liver Function Test

 

What Is the YorkTest Liver Function Test and What Is It Used For?

 

The YorkTest Liver Function Test is an at-home diagnostic kit that measures key liver enzymes and proteins in a small finger-prick blood sample. It is used to screen for signs of liver stress, inflammation, or damage — conditions that may not produce noticeable symptoms in their early stages. The NHS describes the liver as one of the body's most vital organs, responsible for over 500 functions including detoxification, protein synthesis, and bile production. Checking your liver health periodically is a sensible step, particularly if you have known risk factors.

This test is not intended to diagnose liver disease. It provides a snapshot of your liver enzyme levels at a single point in time, which you and your GP can use to guide further investigation if needed. Think of it as a starting point, not a final answer.

 

What Do You Need to Know Before Using the YorkTest Liver Function Test?

 

Before using this kit, please read the following carefully. Certain factors can affect your results or make this test unsuitable for you at this time.

Do not use this test if:

  • You are under 18 years of age
  • You are pregnant — liver enzyme levels can change during pregnancy and results may be difficult to interpret without clinical context
  • You have a known bleeding disorder or are taking anticoagulant medicines such as warfarin, as finger-prick sampling may carry additional risk
  • You have recently had a strenuous workout — intense exercise can temporarily raise AST and ALT levels, potentially giving a misleading result
  • You are acutely unwell — if you have symptoms of jaundice, severe abdominal pain, or dark urine, seek urgent medical attention rather than using a home test

Factors that may affect your results:

  • Alcohol consumption in the 24–48 hours before testing
  • Certain medications including statins, paracetamol (in high doses), and herbal supplements such as kava or high-dose vitamin A
  • Recent intramuscular injections, which can raise AST levels
  • Haemolysis (breakdown of red blood cells in the sample) due to incorrect collection technique

 

How Should You Use the YorkTest Liver Function Test?

 

Follow these steps carefully to ensure your sample is collected correctly and your results are as accurate as possible. Incorrect technique is the most common reason for an inconclusive result.

  1. Register your kit online using the unique barcode on the packaging before you collect your sample.
  2. Wash your hands thoroughly with warm water and soap, then dry them completely. Warm hands improve blood flow.
  3. Use the sterile lancet to prick the side of your fingertip — avoid the very tip, which is more sensitive.
  4. Gently squeeze your finger to encourage blood flow. Wipe away the first drop with the gauze provided.
  5. Apply subsequent drops of blood to the collection card or micro-collection tube as directed in the kit instructions.
  6. Allow the sample to dry fully (if using a collection card) before sealing it in the biohazard bag.
  7. Place the sealed sample in the prepaid return envelope and post it on the same day if possible.
Indication Age Group Sample Required Frequency
Liver health screening Adults 18+ Finger-prick blood sample As needed; annually recommended for those with risk factors

 

What Are the Possible Side Effects of the YorkTest Liver Function Test?

 

Because this is a diagnostic test rather than a medicine, side effects relate to the sample collection process rather than any active ingredient. They are generally mild and short-lived. If you are also taking supplements that may affect your liver, it is worth browsing our vitamins and supplements range for guidance on what to consider.

Common side effects (related to finger-prick sampling):

  • Brief stinging or discomfort at the puncture site
  • Minor bruising around the fingertip
  • Small amount of bleeding that resolves quickly with gentle pressure

Less common side effects:

  • Lightheadedness or feeling faint — sit down during sample collection if you are prone to this
  • Localised redness or swelling at the puncture site, which should resolve within 24 hours
  • Anxiety related to receiving unexpected results — if your results cause you distress, speak to your GP

If the puncture site shows signs of infection (increasing redness, warmth, pus, or fever), seek medical advice promptly.

 

How Should You Store the YorkTest Liver Function Test?

 

Proper storage ensures the collection materials remain viable and your results are not compromised. If you are managing other health monitoring products at home, our electrical health and diagnostic range includes additional tools that may complement your health checks.

  • Store the kit at room temperature, between 15°C and 25°C
  • Keep away from direct sunlight, heat sources, and damp environments
  • Do not freeze any component of the kit
  • Keep out of reach of children
  • Do not use the kit after the expiry date printed on the outer packaging
  • Once the sample has been collected, post it on the same day or store it as directed in the kit instructions — do not leave a collected sample for more than 24 hours before posting

Written and reviewed by our qualified team

Your safety and success are our highest priorities. Our medical team rigorously evaluates every product and piece of advice we provide, ensuring you receive only the most effective, science-backed solutions available.

Frequently Asked Questions

Where can I buy a liver function test at home kit in the UK?

You can order the YorkTest Liver Function Test directly from Cured Pharmacy online, with fast UK delivery to your door. No GP referral is needed, and the kit costs £59.00. It is a convenient option if you want to check your liver health without waiting for a clinic appointment.

How does the YorkTest Liver Function Test work in the body?

The test analyses a small finger-prick blood sample for key liver enzymes — ALT, AST, ALP, GGT — and bilirubin, which are released into the bloodstream when liver cells are stressed or damaged. Elevated levels of these markers can indicate inflammation, bile duct obstruction, or other hepatic conditions. The sample is processed in a UKAS-accredited laboratory using validated analytical methods.

How do I use the YorkTest Liver Function Test step by step?

Register your kit online first, then wash and warm your hands before using the lancet to collect a finger-prick blood sample. Apply the blood to the collection card, allow it to dry, seal it in the biohazard bag, and post it in the prepaid envelope on the same day. Results are available via a secure online portal within 3–5 working days of the lab receiving your sample.

How long does it take to get results from the YorkTest Liver Function Test?

Results are typically available within 3–5 working days of the laboratory receiving your posted sample. You will receive an email notification when your results are ready to view securely online. Postal transit time is not included in this estimate, so posting promptly is important.

Who is eligible to use the YorkTest Liver Function Test?

The test is suitable for adults aged 18 and over who want to screen their liver health at home. It is particularly relevant for people with risk factors such as regular alcohol use, obesity, type 2 diabetes, or long-term medication use. It is not suitable for those who are pregnant, have a bleeding disorder, or are acutely unwell with liver-related symptoms.

What liver markers does the YorkTest Liver Function Test measure?

The test measures alanine aminotransferase (ALT), aspartate aminotransferase (AST), alkaline phosphatase (ALP), gamma-glutamyl transferase (GGT), and bilirubin. These are the same markers routinely checked in NHS liver function blood tests. Together they give a broad picture of liver cell health, bile flow, and overall hepatic function.

What should I do if my liver function test results are abnormal?

If any of your results fall outside the reference ranges provided, contact your GP as soon as possible and share your results with them. Abnormal liver enzymes do not always indicate serious disease — they can be caused by temporary factors such as recent alcohol intake or strenuous exercise — but they should always be investigated by a healthcare professional. Do not attempt to self-diagnose based on home test results alone.

Is the YorkTest Liver Function Test as accurate as an NHS blood test?

The YorkTest kit is analysed in a UKAS-accredited laboratory using validated assay methods comparable to those used in clinical settings, so the analytical accuracy is high. However, finger-prick samples are smaller than venous samples and can occasionally be affected by haemolysis or incorrect collection technique. It is a reliable screening tool but is not a replacement for NHS diagnostic testing if you have symptoms or a clinical concern.

Can I eat and drink normally before taking the YorkTest Liver Function Test?

You do not need to fast before this test, but you should avoid alcohol for at least 24–48 hours beforehand, as it can temporarily raise GGT and other liver enzyme levels. Avoid strenuous exercise in the 24 hours before sampling, as this can elevate AST. Follow any specific preparation instructions included in your kit.

How often should I do a liver function test at home?

For most healthy adults without risk factors, an annual check is a reasonable approach. If you have ongoing risk factors — such as regular alcohol consumption, obesity, or long-term medication use — your GP may recommend more frequent monitoring. Always discuss the appropriate testing frequency with your healthcare provider based on your individual circumstances.

What are the alternatives to the YorkTest Liver Function Test?

Alternatives include requesting a liver function blood test through your GP (free on the NHS if clinically indicated) or using other accredited home blood test providers. Some private clinics also offer venous blood draws for liver panels. If you are monitoring broader health metrics, our electrical health and diagnostic range includes other home monitoring tools worth considering.

Can medications affect my liver function test results?

Yes — several medicines can raise liver enzyme levels, including statins, paracetamol (particularly in higher doses), non-steroidal anti-inflammatory drugs (NSAIDs), and some herbal supplements such as kava or high-dose vitamin A. If you are taking any regular medications, mention this to your GP when discussing your results. Do not stop prescribed medicines before testing without medical advice.

What are the latest findings on home liver function testing?

Research increasingly supports the use of dried blood spot (DBS) and finger-prick sampling for liver enzyme analysis as a viable alternative to venous sampling in community screening settings, with studies showing good concordance between the two methods when samples are collected correctly. Home testing is particularly valued for improving access to liver health screening in people who face barriers to attending clinical appointments. Always ensure any home test you use is processed by an accredited laboratory.

How long does liver function test monitoring need to continue?

The duration of monitoring depends entirely on your individual health situation and any underlying conditions identified. If your results are consistently normal and you have no risk factors, annual screening may be sufficient. If abnormalities are found, your GP will advise on the appropriate follow-up schedule, which may include repeat testing at shorter intervals or referral to a hepatologist.

Can I use the YorkTest Liver Function Test if I am taking vitamins or supplements?

Some supplements — particularly high-dose vitamin A, niacin, and herbal products — can affect liver enzyme levels and may influence your results. It is worth noting which supplements you are taking and discussing them with your GP when reviewing your results. If you are unsure whether a supplement could affect your liver, browse our vitamins and supplements range and consult a pharmacist for guidance.

How Should You Use the YorkTest Liver Function Test?

Using this kit correctly is essential for getting a reliable result. Before you begin, make sure you have registered your kit online using the unique barcode on the packaging — results cannot be returned without registration. Follow these steps carefully:

If you are unable to collect enough blood, try warming your hands again under warm running water before reattempting. Do not squeeze the fingertip so hard that the skin turns white.

What Is the Correct Dose of the YorkTest Liver Function Test?

This is a single-use diagnostic test kit, not a medicine, so there is no dosage in the traditional sense. The table below outlines the sample requirements and recommended testing frequency based on individual circumstances.

Each kit contains materials for one test only. Do not attempt to reuse any component of the kit.

When Is the Best Time to Use the YorkTest Liver Function Test?

There is no strict requirement to test at a specific time of day, but morning testing is generally recommended. Avoid alcohol for at least 24–48 hours before collecting your sample, and avoid strenuous exercise in the 24 hours prior, as both can temporarily elevate liver enzyme levels and affect the accuracy of your results. Testing when you are well-rested and have not recently eaten a very high-fat meal is also advisable.

Post your sample as early in the day as possible to avoid it sitting in a postal collection point over a weekend. Most laboratories advise against posting samples on a Friday if next-day delivery is not guaranteed.

How Long Can You Use the YorkTest Liver Function Test For?

Each kit is a single-use product and should not be reused. If you wish to monitor your liver health over time, you will need to purchase a new kit for each test. There is no clinical limit on how many times you can test, but the appropriate frequency should be guided by your GP based on your health history and any results you have already received. If your results are consistently within normal ranges and you have no risk factors, annual testing is generally sufficient.

Do not exceed the recommended dose. If in doubt, speak to your pharmacist.

What Are the Most Common Side Effects of the YorkTest Liver Function Test?

Because this is a diagnostic test kit rather than a medicine, any side effects are related to the finger-prick blood collection process rather than an active pharmaceutical ingredient. The vast majority of people find the process straightforward and experience only minor, short-lived discomfort.

  • Brief stinging or sharp sensation at the moment of the finger-prick
  • Minor bruising around the puncture site, which typically resolves within 24–48 hours
  • Small amount of bleeding at the puncture site, which stops quickly with gentle pressure using the gauze provided
  • Mild soreness at the fingertip for a few hours after sampling

What Are the Less Common Side Effects of the YorkTest Liver Function Test?

A small number of people may experience the following. These are not dangerous but are worth being aware of before you begin.

  • Lightheadedness or feeling faint — this can happen in people who are sensitive to blood or needles. Sit down during sample collection and remain seated for a few minutes afterwards if you feel unsteady.
  • Localised redness or mild swelling at the puncture site, which should resolve within 24 hours
  • Difficulty obtaining enough blood — this is not a side effect as such, but can be frustrating. Warming your hands beforehand usually resolves this.
  • Anxiety or distress related to receiving unexpected results — if your results cause you significant worry, speak to your GP rather than attempting to interpret them alone.

What Are the Serious Side Effects of the YorkTest Liver Function Test?

Serious adverse events from a finger-prick blood test are extremely rare. However, you should seek medical advice if you notice any of the following after sample collection:

  • Signs of infection at the puncture site — increasing redness, warmth, swelling, pus, or fever developing in the hours or days after testing
  • Prolonged or heavy bleeding that does not stop with gentle pressure after several minutes
  • Numbness or persistent pain in the finger beyond 48 hours

If you experience any of these, contact your GP or call NHS 111 for advice.

What Should You Do If You Experience Side Effects?

For minor discomfort at the puncture site, apply gentle pressure with the gauze provided and keep the area clean. If you feel faint, lie down with your legs elevated until the feeling passes. Do not attempt to collect a second sample immediately if you feel unwell — wait until you have fully recovered. If you are concerned about any side effect, no matter how minor it seems, contact your pharmacist or GP for guidance.

Can the YorkTest Liver Function Test Interact With Other Medicines?

The test itself does not interact with medicines, as it is a diagnostic device rather than a drug. However, certain medications can affect the liver enzyme levels measured by the test, potentially influencing how your results are interpreted. These include statins, paracetamol (particularly at higher doses), non-steroidal anti-inflammatory drugs (NSAIDs), some antibiotics, and herbal supplements such as kava or high-dose vitamin A. Always inform your GP of any medicines or supplements you are taking when discussing your results, so they can interpret them in the correct clinical context.

If you are concerned about any side effects, contact your pharmacist or GP immediately.

Patient Information Leaflet

Important - Before taking any medication, it is always important to read the Patient Information Leaflet (PIL)

Written and reviewed by our qualified team

GPhC Number: 2233073
Tarun Kumar

Reviewed by:

Tarun Kumar

Superintendent/ Clinical Lead

📖 Find out more about our team of medical content authors and how we ensure the accuracy of our content with our content guidelines.

Content last updated: 31 Mar 2025

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