Carbohydrate Deficient Transferrin (CDT) DVLA Blood Test
Is it for you?
Please note: This test is analysed using a different method from the official DVLA laboratory. It will not be possible to get a result for around 2% of people taking this test due to a normal genetic variant in transferrin, which is a protein produced by the liver. In this situation, an alternative test will be recommended.
- Alcohol Consumption
Alcohol Consumption (1 Biomarker)
From the expert
Intermittent or binge drinking can also increase CDT levels. The extent to which this occurs is dependent on the frequency of binges and the amount of alcohol consumed on each occasion. Elevated CDT will decline with reduced alcohol consumption and will revert to normal after several weeks of abstinence.
This test has a very high level of specificity (i.e. it is not affected by other drugs or substances) and therefore it has been adopted by the Secretary of State's Honorary Medical Advisory Panel as the sole test for assessing harmful use of alcohol for high risk offenders.
Why take this test?
- You have received a driving ban and are reapplying for your license from the DVLA
- You want to make sure that you will pass the DVLA medical
- You want to use this test as proof that you have stopped or reduced your alcohol consumption
- You've been asked by your medical practitioner to take this test
Laboratories you can trust
Trusted by the NHS and private clinics alike, you can be sure of the highest testing standards from our UKAS accredited partner laboratories.
Expert advice with your results
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Your personal health centre
Discover the easy way to track your health through our online portal, my.medichecks.com. View your results with doctor's advice, monitor any changes over time and see the improvements you can make to your health with simple lifestyle changes.