“It is beyond epidemic proportions. There truly is a tidal wave of Alzheimers disease”, says, Dr. Fortanasce. An estimated 200,000 people in the United States un rage 65 are living with younger onset Alzheimers disease. And hundreds of thousands more are coping with mild cognitive impairment, a precursor to Alzheimers and other dementia. Through his research, Dr. Vincent Fortanasce, a clinical professor of neurology in Southern California, believes that there may be a link between chronic use of marijuana, especially when started at a young age – and Alzheimers.