I work in multinational company and yesterday they asked me one hair from my hair to give it for hair drug testing. As I am new here I have never heard this name before and I want to know what the hair drug testing facts are? How many days will it take to give the results? Is it applicable on all the employees on U.S? Is it possible that the test can give fault results? What if a person who has to undergo this test is bald or has a shaved head?
