The amount of time that alcohol can be detected in your system can vary depending on how much you’ve consumed, the type of test used and individual biological factors.

In general, a blood test can measure alcohol in your body for up to 6 hours after your last drink, while breathalyser tests work for between 12 and 24 hours. Urine tests, such as the ethyl glucuronide (EtG) test, are also effective for around 12 to 24 hours after use. This method tests for ethyl glucuronide, a breakdown product of ethanol – which is the alcohol you find in alcoholic beverages. Alcohol can also be detected in your hair follicles up to 90 days after consumption.