how long does it take for a hair drug test results to come back
Hair Testing. Hair testing can detect drug use up to 90 days before the date of the test, and is also less invasive. For this reason, more employers are choosing to test hair during drug screens. The drawback to hair testing is that results take more time than urine testing.ccording to the diagnostics testing company Asure Test, results of hair drug screens typically take five to ten business days to deliver. Some companies boast of 48-hour turnaround times for testing hair samples, but shipping time can add two or more days.