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A member asked:
What is the longest my hair follicle test should be positive for fentanyl? in july my level was 1,646 and down to 327 130 days later. when can i expect a clean test?
A doctor has provided 1 answer
This will depend on how fast YOUR hair grows. I would ask testing lab or go to PUBMED.gov and look at the most recent research.
Answered 12/17/2022
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