The minimum amount of hair many places need to analyze correctly is 1/4th inch (our tests require at least a half inch, though). If they cannot get a half inch of hair they may try to collect body hair, which can represent use from anywhere from 6 months to 1 year ago. If you use cocaine with any pattern of frequency it is more than likely it will show up on a hair drug test if they are able to collect.

Drug use is only reflected in the hair that was being nourished by the bloodstream at the time of use. So if you grow out your hair and cut it the hair can be clean. Hair (on the head) grows at the pace generally of a half inch per 30 days, or about 1/4th inch per 2 weeks. The only exception to this rule is marijuana; due to the nature of THC marijuana can be stored in the fat and slowly released over time back into the bloodstream even though someone has stopped smoking. Generally, this is something that is of concern to a frequent smoker. This is all only relevant to head hair though; body hair growth rates are harder to measure, as it grows much more slowly.

Thanks for your question,
Robyn

You don’t have to pull out hair from the scalp – you just need to cut 100-120 strands from as close the scalp as possible. We have a video coming out soon that will make this clearer. However, we do already have instructions up online so they should give you an idea of how to do the test: http://www.homehealthtesting.com/hair_drug_test_standard_instructions.php

If you have any other questions let us know! Thanks and take care!

Robyn

It would be possible to use body hair though. All of our hair drug tests accept body hair submissions with the exception of the PDT-90. Body hair grows more slowly than hair on the head though so it’s possible the use would not be reflected in the body hair yet. I would wait a few extra weeks to collect body hair if you would like to test it. It’s also possible if cocaine was only used one time that not enough was used to be reflected in the test. The test is very, very accurate though and cocaine use of any regularity should be picked up.

Thank you again for your question and I hope this information is of some help. If you have any other questions please feel free to let us know.

Thanks for your question! The only hair drug test that we sell that includes a MRO (Medical Review Officer) review is the Legal Workplace Hair Drug Test Kit. So unless you ordered that one, there is no MRO Review. The Medical Review Officer does NOT perform a separate hair analysis, or change the results in any way. Their review consists of (if the results are positive) contacting the donor and asking a few questions (about possible cross reacting substances or prescriptions, etc.). In most contexts this review is unnecessary as it does not change the results at all. The hair analysis itself is done by highly trained lab techs in a CLIA certified laboratory.

Thank you for your question and please let me know if I can help you with any other questions!

Best,

Robyn