THC (tetrahydrocannabinol) is the chemical ingredient in marijuana that gets users high. Although federal and state laws conflict on the legality of pot, including medical marijuana, drug testing in schools and the workplace continues. The www.HomeHealthTesting.com infographic below provides some estimates on the time frames when different types of tests can detect THC. California NORML (National Organization for the Reform of Marijuana Laws) emphasizes there are no simple guidelines for cannabis detection tests. For NORML’s more comprehensive information on marijuana …
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