Ethyl Glucuronide (EtG) Hair Alcohol Test – The test measures any alcohol consumption up to 90 days. This test does not measure current impairment or under the influence. It takes about 5 days for EtG to get into the hair. You must have head hair or body hair for this test. Hair can provide long-term history of drug and alcohol abuse by trapping biomarkers in the fibers of the growing hair strand. Our EtG (Ethyl Glucuronide) Hair Alcohol Test checks for the presence of the Ethyl (drinking) Alcohol metabolite, Ethyl Glucuronide.