Δ⁹-tetrahydrocannabinol (Δ⁹-THC) exerts a direct neuroprotective effect in a human cell culture model of Parkinson's disease. Carroll CB, Zeissler M-L, Hanemann CO, Zajicek J Neuropathol Appl Neurobiol. 2012 Oct; 38(6):535-47. PMID: 22236282. Abstract CommentRecommendBookmarkWatch