Quote Originally Posted by flippnout
From everything I have read they cut the hair off as close to the scalp as possible. I have not read of a test where they pull the hairs out so they could test the root. I think that would be too painful considering they take 60 hairs.

Maybe a senior member will chime in and answer this one...
I'm not senior here, but Boobs will confirm, I know my shit about this subject.

The test is done on the hair strand, not the root.

And yes, if you have been clean 10-14 days, all new growth should be clean.