In preclinical animal studies, CBD has shown to reverse and prevent the development of cognitive deficits. In one, three weeks of daily CBD treatments was effective at reversing the cognitive deficits of mice with injection-induced Alzheimer’s disease. Another found that eight months of CBD treatments helped prevent the development of social recognition memory deficits.
Another study also suggests that CBD’s therapeutic effects for Alzheimer’s disease may be even greater when combined with tetrahydrocannabinol (THC), the well-known psychoactive compound. In one study, a drug containing CBD and THC decreased gliosis and reduced the buildup of alpha beta and tau. Additionally, the researchers discovered, a combined CBD and THC treatment appears to offer greater anti-dementia effects while avoiding the euphoric effects that develop when taking THC alone. To read full article click here
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5289988/