A member asked:

I had a urine test today i am a heavy smoker but havnt smoked marijuana in bout 16 days will it show up?

A doctor has provided 1 answer
Dr. Robert Killian answered

Specializes in General Practice

Marijuana and UAs: Yes. Very likely. Marijuana can hang in the fat cells in your body for a long time. Sixteen days may not have been enough time to clear this fully.

Answered 4/16/2013

5.2k views

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