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Typically, a hair test will detect drug use over the prior 6 months. Hair from people buried in the 1700s has been tested positive for cocaine and for opiates.

Sometimes people try to fool the testing by cutting their hair short, but any body hair can be used for the test.

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Q: How long do drugs stay in your system for a hair test?
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No. The drugs stay in your fat cells and hair. Best way is not to use drugs instead of trying to beat the system.


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The amount of time drugs will stay in your system varies by: Your age Your weight Your sex Your physical health Presence of other drugs in the body According to the American Addiction Centers, these are averages from urine tests: Heroin: 1-3 days in your system Cocaine: 2-3 days in your system Marijuana: 1-7 days in your system Meth: 2-3 days in your system MDMA: 2-4 days in your system Many factors will lead to how long a drug will stay in your system because drugs are so very different from each other, and people are also different. Two people using the same drug may have completely different reactions.


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Think of your hair like a timeline. Everything that's going on in your body is recorded by your hair as it grows, kinda like a type writer. If you do any drugs they will become part of that timeline. The only way to get the drugs out of your hair is to buy special shampoo or cut it off.


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