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The answer to that is still in debate and unknown. However, I can tell you that I know someone who did one hit (approx. 15-25mg) about 6 weeks before a hair follicle test and the results came back negative for cocaine. This is not to say that it wasn't "detected" but it was definitely below the 300 pg/mg cutoff level.

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15y ago
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15y ago

very little . when you ingest it the many metabolites enter the sweat and it diffuses into the hair making it look like longer use. hair razorwash removes keratin's and peroxide remove it from melanin

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15y ago

Your hair contains information about what has happened to your body as long as it is not cut off. So, if you were to use illegal drugs, scientists/medical professionals could tell as long as your hair hasn't been cut since that use. This is a cumulative process, and is a good record for those with long hair.

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14y ago

.000000000000000000000000001. Hair tests can basically see what you ate for the last 6 months, If you're getting a hair test, you better be clean for a while before hand or else youre not in good shape, unless you shave every follicle of hair on or in your body, (like your nose hair) they will give the same results.

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12y ago

Years, since what you term "hair follicle sample" is better understood "hair sample," and all your hair was once in a follicle, being made (and contaminated) with whatever was in your system at the time.

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13y ago

Detection of accumulation of cocaine metabolites in hair is possible in regular users until the sections of hair grown during use are cut or fall out.

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10y ago

How much methamphetamine does ittake to fail a hair test

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15y ago

very little . it diffuses into the hair from the oils and sweat making it look like it was more than used . must treat with hair razor.

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Q: How much cocaine does it take to fail a hair test?
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