A new study on marijuana use suggests that the earlier you start smoking it, the worse it can be for your brain.
FOX News Radio's Lisa Brady reports:
Teenagers who routinely smoke pot could end up with a long-term drop in their IQ. This based on participants in New Zealand, and how their IQ scores changed between ages 13 and 38. The implication - that marijuana is especially harmful to a developing brain - echoes earlier research, and it's a trend not found by researchers when frequent use started after age 18.
In the U.S., marijuana was more popular than cigarettes among teens in the latest government report - 23% of high school students, saying they'd recently smoked it.
Lisa Brady, FOX News Radio.