How accurate is a hair follicle test for alcohol?

Results: EtG was detected in 29 out of 100 hair samples. Based on the Society of Hair Testing (SOHT) threshold of 30 pg/mg EtG, the hair test identified alcohol consumption in 57.9% of high-risk drinkers, 45.5% of increasing-risk drinkers and only 9.8% of lower-risk drinkers.

How much alcohol does it take to show up on a hair test?

In hair, the three different EtG thresholds for a positive test were: 30 pg/mg, which according to the Society of Hair Testing strongly suggests chronic excessive alcohol use 25; a USDTL laboratory standard of 20 pg/mg; and 8 pg/mg, the limit of quantitation.

Will one night of drinking show up in a hair follicle test?

The answer is no. One drink will not lead to a positive EtG Hair Follicle Alcohol test results.

Can you fail a hair test for alcohol?

The type of hair tested will determine what results are available. Testing head hair can show alcohol abuse, abstinence, or social drinking, chest or arm hair can show alcohol abuse or abstinence, and pubic hair can show abstinence.

How long does alcohol stay in your hair sample?

Alcohol can stay in your hair for a period of up to 90 days. However, hair tests cannot determine a person’s blood alcohol content. It can only determine if the person has been drinking within the last 90 days.

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What can cause a false positive alcohol hair follicle test?

Prescription medications and certain foods, such as poppy seeds, may contain compounds that might lead to false positive results. Hair samples undergo a two-step process to ensure accurate test results.

Can EtG be washed out of hair?

EtG is a water soluble, incorporated into the hair through sweat. Over time it may be washed out of hair so it has a relatively limited shelf life. FAEEs are fat-loving and are much less sensitive to hair treatments and washing.

How do you get EtG out of hair?

EtG concentrations in hair were reduced after 2 hours of incubation in chlorinated water by 20 ± 12% (range: 4-33%), in deionized water by 24 ± 5% (range: 18-29%).