Does if takes the same the to go away like urine and blood? or does it just stays their in ur hair until you cut it?
How does drug testing using hair sample instead of urine work?
By doing a hair sample, they are able to determine when you used the drugs, and what types of drugs were used. Unlike a urine/blood test, the drug stays there until you get a hair cut.
How does drug testing using hair sample instead of urine work?
Actually it stays in the hair for up to a year.
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