when i thought my test would be a hair test, i was researching some products... and apparently a while ago there was a shampoo that worked, and the company stopped making it for some reason.
i found this product: Hair Follicle Drug Testing - Hair Razor toxin wash

supposedly this shampoo has the same chemicals as the other shampoo that is no longer made.

only reviews i found were on youtube video... which was showing the product off. and ppl said it worked.. idk how legit the reviews were but check into it.

contact them, they reply pretty fast to emails.