What LaFrate didn’t see, however, also astonished him. The 600-plus weed samples generally carried little or no cannabidiol, or CBD — the compound that makes medical marijuana “medical.” The average CBD amount: 0.1 percent, his study reports.
CBD is anecdotally known to control depression, anxiety, and pain. About 200 families with ill children also moved to Colorado to access a strain called Charlotte’s Web, which appears to control seizures in some kids.
“It’s disturbing to me because there are people out there who think they’re giving their kids Charlotte’s Web. And you could be giving them no CBD — or even worse, you could be giving them a THC-rich product which might actually increase seizures,” LaFrate said. “So, it’s pretty scary on the medical side."
The majority of samples tested came from recreational-pot merchants. Under Colorado law, recreational weed must be tested for potency. Some medical-pot sellers voluntarily provided samples to LaFrate. Colorado does not require pre-sale testing of medical marijuana. LaFrate did not analyze any edibles.