There is a great deal of evidence suggesting that cannabis is beneficial for the prevention and treatment of neurodegenerative diseases. Alzheimer’s disease is the most common form of dementia and places a burden on the patient and even more, the caregiver. Often, the most noticeable symptom of Alzheimer’s disease is a decline in cognitive abilities, including an inability to recognize familiar faces.
According to a March 8th, 2014 article on Medical Jane, There was a mouse study done by Australian researchers, led by Dr. Tim Karl to investigate how CBD (Cannabidiol) treatment would affect their cognitive abilities. Here is a link to the study in Psychopharmacology. These mice were genetically engineered to serve as models for humans with Alzheimers.
So In this study, half of the mice received 20mg/kg of CBD per day for 3 weeks, the other half, nothing. They were measured for their ability to perform cognitive tasks and social recognition and then the findings were compared to the control group. According to their findings, the disease caused impairments to social and object recognition and CBD seemed to reverse the effects! Dr. Karl states that It appears to bring their performance back to the level of healthy animals. Of course more studies need to be done.
Here is a link to an article in the Sydney Morning Herald.
And more information on Alzheimer's and Cannabis from Medical Jane Overview
The cannabis plant has been linked to brain neurogenesis, establishing new neurons in the brain. So even if CBD was able to slow or halt the progression of Alzheimers, that would be of great value, let alone reversing it!
If I had a friend or family member who had dementia, Alzheimer's or Parkinson's disease, I would not hesitate to suggest using CBD, as there are no negative effects from its use.