Carbohydrate-deficient Transferrin
Referrals available at Gold Coast, Lismore, Brisbane, and Toowoomba
Carbohydrate-Deficient Transferrin (CDT) testing is a specialised biomarker test used to detect chronic and excessive alcohol consumption over an extended period. CDT levels in the blood increase when an individual consumes significant amounts of alcohol (typically over 50-80 grams per day) consistently for at least one to two weeks. This makes CDT testing a reliable tool for identifying long-term alcohol misuse.
Why CDT Testing Matters
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Family Law Cases
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CDT testing is often used in family law disputes to assess allegations of alcohol misuse that may impact custody or visitation rights.
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The results can serve as an objective measure to demonstrate an individual’s history of alcohol consumption, providing clarity in sensitive legal proceedings.
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Drink Driving Appeals
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For individuals seeking to appeal drink driving offences or regain their licence, CDT testing is a recognised method to demonstrate abstinence or controlled alcohol use over time.
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It offers a credible way to show behavioural change and compliance with rehabilitation requirements.
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Workplace and Other Contexts
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CDT testing may also be used in workplace settings to support alcohol and drug policies or in personal circumstances where evidence of sobriety is required. this is extreme and would need to be considered against Fair Work Commission caselaw.
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How CDT Testing Works
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Sample Collection: CDT testing is performed using a blood sample collected at any QML Pathology clinic from Ballina to Port Douglas.
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Analysis: The sample is analysed for levels of transferrin, a glycoprotein in the blood. Chronic alcohol consumption affects transferrin's carbohydrate structure, resulting in higher CDT levels.
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Interpretation: Elevated CDT levels typically indicate consistent and excessive alcohol intake, while normal levels may suggest moderate or no alcohol use. Interpretation by one of our drug testing experts is included with each test.