I have passed a test twice under two different conditions.
The first time, I hadn't smoked in 5 months and decided to take a few tokes at a Jack Johnson concert. About a month later, I interviewed for a job that required a hair test. I didn't have much knowledge about it so I figured I better do some research...I found out that it usually takes two weeks for it to get into the folicles and the test goes back around 4 months. So I thought that I was screwed.
I found several shampoos on the market and decided to go with the Clear Choice. I followed the directions and took the test about an hour after I used the product. I passed. You have a better chance if you have lighter finer hair. I do.
I thought I was in the clear and started smoking everyday because I thought I had the job. Well, the placed dicked around and waited to hire me 3 months later and my test had expired. I was screwed!!! I ordered the stuff again and thought I would be fine. When I got it, there was a warning on it that the tests were stricter now and they couldn't promise that it would work. I freaked out and did some more research and found a natural way that many people sweared by. I soaked my hair in vinager for about 10 minutes. I left it in and then put an acne wash on my hair that has syliatic acid or however you spell it. I massaged it in my head for about 5 minutes. Then you wash your hair in Tide because it is the best. ONLY TIDE. Wash it goood. Then you wash it with an aloe shampoo. Aloe coats your hair and helps it. Don''t blowdry your hair or put anything in it when you are done and take the test between 1 and 3 hours after you do this process! IT WORKS!!!