Marijuana stays in the body for days to weeks, depending on how often someone uses it. Learn about urine and hair detection ...

But one thing hasn't changed—mandatory drug testing. Whether it's for pre-employment screening, athletic competitions, court-mandated evaluations, or insurance policies, THC detection is still a ...

"We see the increase across the board in drug-impaired ... out how THC, the psychoactive ingredient in cannabis, can be measured in someone's breath because she knows oral fluid testing takes ...