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The standard Hair Follicle test used in the U.S. covers a period of 90 days and test for cocaine, marijuana, opiates
, and methamphetamines.
There are no known adulterants for hair tests of cocaine- meaning there is not any thing that you can do to remove the record of the cocaine from the hair. (There has been one study that showed THC from Marijuana
does not deposit as readily inside epithelial cells so it may
be possible for cosmetic or other forms of adulteration to reduce the evidence of marijuana in a hair sample).
Everything else you hear - using 'kits' to remove drugs and 'toxins' from the system, doesn't remove the record of the cocaine use from your hair. This is why the hair method is used - it provides the longest record of drug use.
Being active and having low body fat will not make a difference in the test results.
So what this all means is that you will fail this test (save for a mistake on the part of the lab) if you have used cocaine in the last 90 days. Since you used cocaine 4 weeks ago, which means you used cocaine in the period which will show up in your hair, you will fail the test.
I know this is not the answer you had hoped for, but this is the truth. I hope you understand that in the long run, a honest answer is the only chance you have at getting past this situation. You can now decide now what you must do regarding the situation for which you are being tested.
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