Twins Study Finds No Evidence That Marijuana Lowers IQ In Teens

“It's a classic chicken-egg scenario,” he says.

UNITED KINGDOM: Roughly half of Americans use marijuana at some point in their lives, and many start as teenagers. Although some studies suggest the drug could harm the maturing adolescent brain, the true risk is controversial. Now, in the first study of its kind, scientists have analyzed long-term marijuana use in teens, comparing IQ changes Read the full article…