A member asked:

Hair drug test coming up, requires 1/2"hair, will only 30 days of history show? decide to quit smoking weed in november 2014.

A doctor has provided 1 answer
Dr. Paul Pyles answered

Specializes in Addiction Medicine

Answer is "no": Congratulations on your decision to quit. However hair sample can show positive for three months or longer.

Answered 5/3/2015

3.2k views

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