Are all hair tests equal

I have a test coming up and am obviously super paranoid. I smoked maybe 5 hits in the past 90 days and took three hair tests. HairConfirm, PDT-90, and one other from a testing place. All came back negative. I’m 5’5" and about 190… yes I could lose a few.

My official test is through Psychemedics. Has anyone taken the mail tests and failed a real lab test? Are they all truly equal?

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