Carbohydrate Deficient Transferrin
The Carbohydrate Deficient Transferrin (CDT) test is a sensitive biomarker that tracks heavy alcohol consumption over an extended period of time. Transferrin carries iron in the blood to the bone marrow, liver and spleen. Drinking too much alcohol increases certain types of transferrin that are carbohydrate-deficient.
What might a high result mean?
Alcohol misuse causes a rise in CDT levels. Steady and heavy drinking (4-6 units of alcohol per day) for several weeks will cause a rise in CDT levels in the blood. The longer a person drinks at this level, the higher the level of CDT. 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.
How might I improve my result?
Elevated CDT results will decline with reduced alcohol consumption and will revert to normal after several weeks of abstinence.