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1 Hair alcohol tests detect alcohol use over a longer period of time than any other type of alcohol testing protocol (for instance, hair tests for alcohol can provide accurate test results regarding alcohol use going back months or even years).
Blood alcohol content, or BAC, is one of the most commonly used ways of determining not only if a person has been drinking alcohol, but also how much alcohol a person has consumed. Although a Breathalyzer test can estimate a person's BAC, to determine actual blood alcohol content, a blood sample must be used.