Some effects of cannabinoids are known to help reduce brain cell death. So far, though, there have been a limited number of studies that look at cannabinoids as a treatment. Specifically for people with Alzheimer’s disease. Further study is important because cannabinoids may not have the same effect on a brain with Alzheimer’s disease as they do on a healthy brain. Cannabinoids normally have a calming effect when used by most people, but they might have the opposite effect in people with Alzheimer’s disease.