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Does hair follicle drug testing work?

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Does hair follicle drug testing work?

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On One Hand: Hair Follicle Drug Testing WorksNot only does hair follicle testing work for detecting cocaine, PCP, opiates and methamphetamine, but these substances are detectable for 90 days after usage. Marijuana is also detectable via hair follicle testing, but only for three to seven days.On the Other: Cleansing Solutions May Fool the TestThere are hair products that claim to cleanse the hair of all levels of exposure to drug use within 30 minutes of usage, the effect lasting for 48 hours. Many of these hair-cleansing kits offer a money back guarantee.Bottom LineHair follicle testing is an effective method to detect recent drug usage. However, if the person to be tested knows when the test will occur, he may be able to achieve a false negative on the test.

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