A member asked:

How long does it take for hair to grow thc free, after last marijuana use. i have to pass a hair test in two months. heavy user, fast metabolism?

2 doctors weighed in across 2 answers
Dr. Heidi Fowler answered

Specializes in Psychiatry

Months: It can take months for a heavy user.

Answered 4/19/2016

5.1k views

Thank
Dr. Pamela Pappas answered

Specializes in Psychiatry

90 days at least: Hair follicles will remain positive for at least 90 days after heavy use.

Answered 5/3/2016

5.1k views

Thank

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