Longer Detection Periods with hair drug tests
While urine and oral testing are the most popular methods, hair testing is actually the most effective. It can detect a pattern of drug use over the course of a 90 day period prior to the sample being taken. This method can test for all of the same substances as traditional drug screening and it can pick out users at a higher rate. While urine testing is great for post-accident and reasonable suspicion screening, hair testing is becoming more popular for employers during the pre-employment phase.