I have been sober since last June. I just took a hair follicle and it came back positive for meth. How is that possible? My probation officer is sending another sample to the lab. She says she believes im sober. I am just beside myself.
Detection window (meth specifically)
Standard test: ~90 days
Shorter hair sample: shorter window (e.g., 1 inch ≈ ~60 days)
Longer hair (rarely used): could go back further, but most labs standardize at 90 days
Perhaps your around people smoking it? from what I’ve seen that can affect your results as well.
Are you using Sudafed or Vicks Vapo Inhaler or Ephedrine products? Those can all cause a false positive
via immunoassay screening tests (the quick cheap cup tests)