False Negative Hair Test?
Here's an interesting question. I may have to submit to a hair test for a Job I'm currently in the process of applying for. I was afraid of a single usage of pot showing up from a couple months ago. So I bought a hair test from Hairconfirm and sent them a sample to test. I received the results and it came back negative. Fantastic.
But I take 20mg of an Adderall generic everyday, and that didn't show up either. Is it possible that a dosage of 20mg of Amphetamine salts a day is not enough to accumulate in the hair, to cause a positive result on a hair test? Or was this a mistake by the lab?
Ive spent hours of time researching hair tests and how certain drugs are incorporated into the hair. I realize now that a single use of Marijuana will almost never show up in a hair test. But amphetamine is supposed to actually be attracted to Keratin and readily bond with hair. Any info would be greatly appreciated.