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?

Q: 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?

: 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.

A doctor has provided 1 answer

Dr. Clarence Grim answered

Specializes in Endocrinology

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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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

Dr. Clarence Grim answered

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