Marijuana affects cognitive development in adolescents and may be a gateway drug for opioids.
https://www.nytimes.com/2019/06/16/opinion/marijuana-brain-effects.html?action=click&module=Opinion&pgtype=Homepage https://nyti.ms/2IjZXMQ This article addresses recent research strongly suggesting that teenagers are extremely vulnerable to the cumulative effects of regular use of pot. Pot impairs executive functioning, brain processing speed, memory, attention span and concentration. Furthermore, we used to think that weed was a gateway drug and then research suggested that this was in fact not the case. [...]