If I did 1 gram of coke in the last 90 days, zero in 5 months prior, can I pass a follicle test?
Going back 90 days. Will cutoff level save me.

What happens when you FAIL ?

A hair drug test is meant to show consistent use over time. A 1.5 inch sample, cut at the scalp line, will yield a 90 days history. If they use a basic hair drug test which has higher cut off levels you will definitely have a better chance of passing. I am guessing you have about a 85% chance of passing, just a guess.