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Hair tests are more costly. Supposedly there is a shampoo that you can use that will stip your hair of evidence for a while. However, you don't know what part of your body they will take the sample from.
I took some sort of drink but I don't remember what it was (it was four years ago). I stopped for about 5 days and I was a heavy smoker (2-3 times/day) at the time.
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