Alzheimer's Disease includes reduced brain activity and function (red areas above), the result of years of accumulated damage. THC and CBD in marijuana seem to prevent this damage. A paper published by the British Journal of Pharmacology suggests that the chemical compounds in marijuana likely prevent the onset of Alzheimer's disease, Parkinson's disease, Huntington's disease, and age-related dementia. Chronic brain inflammation, oxidative stress, and intra-cellular dysfunction are the primary…