Do benzoylecgonine be in your hair?

Answer 1

Yes. Drug tests using hair will test for benzoylecgonine, if you test positive for cocaine on an immunoassay test. If you test positive for benzoylecgonine, a metabilite of cocaine, you have no defense for accidently ingestion. The average human grows 1/2 of an inch of hair in a month, so the testing facility will cut at least 180 strands of over 1 1/12 inch length hair for testing (ANY type of hair). The legal system currently states that hair drug tests can go back 90 days (hence the 1 1/2 inch length) and if they use a GC/MS or LC/MS/MS to determine the quantitative amount, you are very hard pressed to deny anything.