Early Cannabis Use May Stall Key Brain Skills in Teens

A large U.S. study of more than 11,000 participants found that teens who began using cannabis showed slower improvement in memory, attention, and other cognitive skills.

Evidence of THC exposure was linked to greater memory decline over time, while the strongest effects were seen among youth with cannabis use.

Researchers say early cannabis use may disrupt brain maturation during a critical developmental window, with possible effects on learning and everyday functioning.