Marijuana testing used to mean checking to see if someone had been smoking it. But with Oregon, Washington and Colorado all making pot more widely available to the public, laboratory testing for safety, purity, potency and active ingredients is adding to the legitimacy of the drug.
The marijuana sold in Colorado dispensaries is exponentially stronger than what people smoked decades ago. Advances in technology and growing techniques have produced a more potent product.
Marijuana may be coming out of the black market in Colorado and Washington state, but the drug, at least for now, will retain a decidedly underground feel: Users may not know what’s in it.