system
Given the following post, respond as if you're commenting on Reddit:
human
Is there a consensus on how cannabis impacts the brain in the long term?

I always read the research on acute effects, which while useful, I find to be less personally important than long-term effects. This is because I use it usually in contexts where I'm okay to have some deficits in memory etc. However, is there good research on the long-term effects? I'm looking to the literature now but wanted to ask too because it would take a while to tease apart the good and bad research, before integrating the info into a clear picture.
gpt
There are very few studies into the long term effects of  THC on the brain, specifically on developed adult brains, for a few reasons. It's been very difficult to study THC because of its restrictions in the past, although now it has become less restricted there hasn't been enough time for long term trials. Most of the current existing information on long term effects is from cross sectional and observational studies trying to find correlations with other factors such as lifetime achievement.

It is concretely known that THC has extremely negative effects on a developing brain, and can alter development in ways that permanently effects memory and other cognitive aspects.