MARC LANDERS: People who had ever used cannabis tended to have larger brain volume in key areas that are full of natural cannabis-like receptors (especially the hippocampus, amygdala, caudate, and putamen – these areas are important for memory, emotions, learning, and movement).

Data on 35,000+ adults: the more cannabis you’ve used in life, the bigger your hippocampus and the better your brain works after 40!

People who had ever used cannabis tended to have larger brain volume in key areas that are full of natural cannabis-like receptors (especially… pic.twitter.com/ysXiH04VWc

— Marc Landers (@marclanders) July 12, 2026