Found out I have to take a hair test in under a week, and up til that point I had been smoking multiple bowls/day.

So, right away I:
Bleached my hair (40 volume)
Dyed it back to its original color

Then, like 5 days later (the night before the test), I:
Bleached my hair (40 volume)
Dyed it back to its original color

Morning of the test I:
Made a baking soda paste and rubbed it in my hair (to open the cuticle (thanks Jerry G))
Did a full Zygot treatment, then went right in and took it.

Did it at a place called Concentra. I hadn't heard for a couple weeks, so I emailed them and I found out I passed.
So, it's totally possible to pass and lots of people do.