[quote=gzz]”there are uncountable people who have smoked high-grade marijuana regularly for decades. ”
ZK, Mark Kleiman of UCLA has been writing about the topic of very heavy marijuana users for a while, and I find his work convincing. He is far from a drug warrior, and was hired by Wash state to implement its legalization. He is pretty concerned about the effects of legalization on this group, and also the easier access to young people to high THC product.
There really is evidence that heavy use is pretty bad for you. What it comes down to is whether the heavy users would have been heavy drinkers otherwise, in which case the substitution is a net positive.[/quote]
I wouldn’t disagree that there’s evidence that prolonged, heavy use is bad for you. Overdoing almost anything is bad. Overdoing marijuana is probably worse then overdoing a lot of non-drug things, but not as bad as overdoing most other drugs.
Light to maybe moderate use of marijuana seems to make a lot of people quite happy. And heavy use works for some people, too. Seth Rogen says, “it’s enhanced my life greatly.” But you’re right; there is a downside in that some people will overdo it.
