Marijuana worsens MS brain deterioration By admin | March 13, 2020 Marijuana worsens MS brain deterioration New research proves that prolonged use of cannabis in multiple sclerosis (MS) patients results in even poorer performance on cognitive (intellectual) skills already affected by MS. Read more: http://sunnybrook.ca/media/item.asp?c=1&i=621 Share this...FacebookTwitterPinterestLinkedinStumbleuponRedditTumblrEmail Posted in Videos