EtG: Nail vs. Body HairBoth hair and nails can be used for legal alcohol testing.
Nail alcohol testing
EtG biomarkers become trapped within the keratin fibres along the length of a nail, which can provide a detection period of up to 12 months.
Approximately 10 mg of nail is required for the test. The nail is collected as close to the nail bed as possible. If the nail is long (5 mm or above) then only one would be required. If the nails are short then it may be best to take clippings from several nails. Toe nails as well as finger nails can be used, but not a mixture of both. The advantages of using toe nails is that there is less potential for environmental exposure.
Acrylic nails, Shellac and other forms of nail varnish would need to be removed as this may damage the surface of the nail and impact on the results.
Window of detection: up to a 12-month overview.
Advantages: simple-to-collect sample to measure levels of EtG. Ideal for those cases where hair testing is not possible (such as the donor has no or little hair, for religious reasons, and for those concerned with their appearance).
Body hair alcohol testing
Biomarker testing in body hair can establish an overview of a person’s alcohol consumption for up to 12 months. AlphaBiolabs determines alcohol abuse in head hair by detecting two metabolites of alcohol: EtG and fatty acid ethyl esters (FAEEs).
These markers of alcohol intake are incorporated into the hair via different routes: EtG via sweat and FAEEs via sebum (an oily substance secreted by glands in the scalp). Performing these two different types of hair analyses can assist in building evidence to support the diagnosis of chronic excessive alcohol consumption with a greater degree of certainty.
Window of detection: up to 12-month overview of EtG only.
Advantages: useful for measuring EtG if head hair is not available.
Sample collection options
Nail clipping and body hair samples would need to be collected under chain of custody conditions to support legally defensible results.
One of our trained sample collectors could visit a donor at any convenient address. Alternatively, the donor could visit one of our 11 nationwide Walk in Centres.
Download the Info Sheet
Download this page as a printable PDF
Alcohol markers can be detected in a person’s hair or blood sample. This page discusses the pros and cons of blood vs. hair alcohol testing.
In this article, we look at the different types of blood alcohol test, what each test looks for, and how these tests can be used alongside other methods.