I could make a very long list of idiotic misconceptions police officers have about drugs, but my favorite by far is the legendary marijuana green-tongue. Believe it or not, police officers are actually trained to look for a green tongue as an indicator of marijuana use. In fact, the dreaded green-tongue even made it on the NHTSA’s website. I couldn’t make this stuff up.
I seriously doubt there is any real scientific research supporting that theory. Sure, the NHTSA claims it’s true and cites plenty of studies, but I’m not about to read every single resource they cite to see how exactly they came to the conclusion that a green-tongue means recent marijuana use. Can anyone point me to the specific study? If there is a study, is it peer-reviewed?
I’m going to go out on a limb here and say that there’s no way any self-respecting, independent scientist would have a bunch of test subjects smoke marijuana so he could note the color of their tongue. My guess is that some drug-prohibitionist government lackey who had never actually used marijuana or even associated with marijuana users was asked to list every conceivable sign of marijuana use. Something as stupid as the infamous marijuana green-tongue just had to come from the government.