Who it is for
Is this liver test right for you?
The liver breaks down food, cleans the blood, builds proteins and stores energy. Liver disease often causes no symptoms early. When liver cells are damaged they release two enzymes, ALT and AST, into the blood. A liver test at home checks both in ten minutes. People use it when they notice:
- Unusual tiredness or weakness
- Loss of appetite
- Dark urine or pale stools
- Yellowish eyes or skin
- A swollen belly
Some people have more reason to check. Liver problems have many causes, and several of them build up silently.
- Regular alcoholHeavy drinking can lead to cirrhosis
- OverweightEspecially with diabetes or high blood pressure
- Long-term medicationSome medicines can damage the liver as a side effect
- Hepatitis riskViral hepatitis inflames the liver
What it measures
What this liver function test tells you, and what it does not
It tells you
- Whether ALT, AST or both are above 80 IU/L, the level that points to liver cell damage
- Each enzyme has its own line, so you see which one is raised
- From a fingertip blood sample, in ten minutes, at home
It does not tell you
- The exact enzyme values. It answers above or below one threshold
- Why the enzymes are raised. Intense exercise and overweight can raise them too, and only a doctor can find the cause
- The full picture of your liver. Doctors also look at other enzymes and at bilirubin
- That your liver is healthy for good. A normal result describes today
Contents
What is in the box
- 1 × test device in a sealed foil pouch
- 1 × dropper bottle of diluent 1 mL
- 2 × plastic capillary pipettes one is a spare
- 2 × sterile lancets one is a spare
- 1 × alcohol pad
- 1 × instructions for use in seven languages
- 1 × desiccant bag discard it, do not use it
Everything you need is in the box except a timer. Keep the foil pouch sealed until you test.
How it works
Five steps, about fifteen minutes
01
Prepare the lancet
Very important: do not touch the trigger. Twist the grey protective cap off, never pull it. Keep turning until it comes away.
02
Take a blood sample from your fingertip
Very important: use the pipette correctly — lightly touch the drop of blood with the pipette’s tip, not the skin, do not squeeze the bulb, fill to the line.
03
Put the blood into the sample well
Press the pipette bulb to release the blood into the sample well. Then wait 30 to 40 seconds until it is absorbed.
04
Add exactly 4 drops of diluent
Very important: add the diluent only after the 30 to 40 seconds. Hold the vial upright and add exactly four drops, 2–3 seconds apart.
05
Read the result after 10 minutes
Not after 15. Set a timer.
Instructions for useWatch the video demonstration
On the clock: the ten minutes, step by step
- Drop in
Blood from the pipette into the sample well.
- Wait, then diluent
Not before 30–40 seconds. Then exactly four drops, 2–3 seconds apart.
- Colour moves
Lines begin to form. Not readable yet.
- Read
Read the result now, in good light.
- Stop
Do not interpret the result after 15 minutes.
Your result
How to read your liver test result
A blue line at C plus any red line means a liver enzyme is raised. A blue line alone means both are normal. One red line is enough for a positive result, however faint. The pictures below show each result.
Enzyme raised positive
A blue C line and one or two red lines. Line 1 is ALT, line 2 is AST. One or both are above 80 IU/L. See your doctor.
Normal negative
Only the blue C line is visible. ALT and AST are below 80 IU/L.
Invalid repeat
No C line. The result cannot be read. This happens most often when the diluent is added before the blood has been absorbed. Repeat with a new test and a fresh blood sample, and wait the full 30 to 40 seconds before you add the diluent.
A faint red line still counts as a line — the intensity of the colour does not matter. Read at 10 minutes; do not interpret the result after 15. The pictures are for illustration purposes; the actual lines may differ in intensity.
Next step
What to do with your result
If an enzyme is raised
See your doctor and show the result. They may order a full liver panel with other enzymes and bilirubin, because raised transaminases have many causes — some as harmless as a hard training session the day before.
If both are normal but the symptoms stay
A normal result means neither enzyme was above the threshold today; it does not rule out every liver problem. If tiredness, loss of appetite or other symptoms continue, see your doctor.
The technology
What happens inside the test device
All of it happens on a paper strip inside the test device, in ten minutes.
- The sample moves
The drop of blood and the diluent travel along the strip by capillary action. No pump, no power.
- Antibodies find ALT and AST
The strip carries antibodies tagged with coloured particles, one set for each enzyme. As the sample passes, they bind to the ALT and AST in it.
- Two test lines
A second antibody for ALT is fixed above the number 1, and one for AST above the number 2. Above 80 IU/L, enough colour gathers to show a red line at that position.
- The C line
The excess reagent is caught at C and shows as a blue line. It proves the liquid flowed. No C line, no result.
It gives one answer — above or below the threshold — not a number.
Quality
Made in France, checked batch by batch
30+
years of diagnostic expertise — rapid tests made in France since 1991
- ISO 13485The international quality-management standard for organisations that design, manufacture and service medical devices
- Every batch checkedDefined checks completed before a batch is released
- Monitored after releasePerformance tracked for as long as the batch is on the market
Notified body 0483ISO 13485Made in FranceCE-marked IVD
The Patris Health promise. No valid result? Write to us and we replace the test or refund the purchase price. It applies whenever the test was performed as the instructions describe, and we do not argue about it.
Specification
Technical data for the liver test
| Intended use | Qualitative immunochromatographic screening test for increased transaminase levels (ALT and AST) in capillary whole blood, for self-testing by lay users |
|---|---|
| Analyte | Alanine aminotransferase (ALT) and aspartate aminotransferase (AST) |
| Method | Lateral flow immunoassay |
| Cut-off | 80 IU/L for each enzyme (IFCC reference method) |
| Sample | Capillary whole blood from a fingertip, pipette filled to the line |
| Time to result | Read at 10 minutes; do not interpret after 15 minutes |
| Agreement | 95.83 % overall agreement with the clinical chemistry reference method (95 % CI 89.19–99.04 %) |
| Storage | 4 to 30 °C, do not freeze |
| Expiry date | Indicated on the label and the foil pouch |
| Device type | CE-marked in-vitro diagnostic medical device (IVD) for self-testing |
| Certificates | CE 0483 · ISO 13485 |
Questions
Asked before ordering
How accurate is a liver test at home compared with the laboratory?+
In the evaluation study, the test agreed with the laboratory reference method in 95.83 % of cases (95 % CI 89.19–99.04 %). The difference is what you get back: the laboratory reports the exact ALT and AST values, this test tells you whether each is above or below 80 IU/L. For a first answer that is enough; the numbers come from your doctor afterwards. As with any screening test, false positive or false negative results are possible.
Does the finger prick hurt?+
It is a brief prick. Wash your hands with warm water first, massage the finger towards the tip for 10 to 15 seconds, and prick the side of the fingertip. The needle retracts into the lancet straight away.
Only one red line appeared. Is that a positive result?+
Yes. Liver problems can raise only one of the two enzymes. A blue C line with one red line, at either position, is a positive result.
I trained hard yesterday. Should I wait?+
Intense exercise can raise the transaminases for a short time. For a result that reflects your liver and not your training, it is better to test on a rest day.
When should I test?+
When you notice signs such as dark urine, pale stools, loss of appetite, yellowish eyes or skin, or unusual tiredness. The test can be performed at any time of the day.
What if I cannot get enough blood?+
Massage the finger gently from its base towards the tip, with a light squeeze-and-release motion, until a large drop forms. Then fill the pipette to the line. Every kit has a spare lancet and pipette for a second attempt.
The lancet did nothing when I pressed it+
A lancet works only once. If the grey protective cap was pulled off by force instead of twisted, the lancet may already have been triggered. Take the spare lancet, give the cap a quarter turn, keep turning until it comes away, then press the lancet firmly against the side of the fingertip and press the trigger button.
Why did I get an invalid result?+
The most common causes are an incorrect amount of blood, adding the diluent before the blood was absorbed, or a test device that was exposed to moisture before use. A test device can be used only once, so repeat with a new test: fill the pipette to the line, wait 30 to 40 seconds, then add four drops. Write to us and we replace the test.
How do I dispose of the lancet?+
The needle retracts into the lancet body after use, so all components can go in household waste. If your pharmacy collects sharps separately, use that; it is the tidier option.
Sources
Institute for Quality and Efficiency in Health Care. (2023, February 28). In brief: How does the liver work? InformedHealth.org. https://www.ncbi.nlm.nih.gov/books/NBK279393/
National Institute of Diabetes and Digestive and Kidney Diseases. (2021, April). Symptoms & causes of NAFLD & NASH. https://www.niddk.nih.gov/health-information/liver-disease/nafld-nash/symptoms-causes
National Institute of Diabetes and Digestive and Kidney Diseases. (2023, June). Symptoms & causes of cirrhosis. https://www.niddk.nih.gov/health-information/liver-disease/cirrhosis/symptoms-causes
National Library of Medicine. (2024a, November 5). ALT blood test. MedlinePlus. https://medlineplus.gov/lab-tests/alt-blood-test/
National Library of Medicine. (2024b, November 5). AST test. MedlinePlus. https://medlineplus.gov/lab-tests/ast-test/
World Health Organization. (2026, July 28). Hepatitis C. https://www.who.int/news-room/fact-sheets/detail/hepatitis-c
Last reviewed 2 October 2026
Instructions for use
Patris Health Liver Function Home Test
Detection of liver enzymes ALT and AST in whole blood. CE-marked in-vitro diagnostic medical device for self-testing.
This is the English part of the multi-language instructions for use. The printed instructions in the box carry the same text in seven languages: English, German, French, Italian, Spanish, Dutch and Slovenian. If the version printed on the instructions in your box differs from this one, follow the instructions in your box.
Precautions and test components
Read this before you start: safety, storage and what is in the kit.
Testing procedure
Step by step, with a picture for each step.
Interpretation of the results
How to read your result, with pictures.
About the test
Background, questions and answers, accuracy.
Questions about the test: help@patris-health.com
Instructions for use LVRV02, January 2025 · © Patris Health. Copying and reproduction are not permitted.
