Research suggests that coffee consumption (3 to 4 cups daily = approx. 400 mg caffeine) may have a positive effect on dementia risk https://www.youtube.com/watch?v=Y5-Gjg1U58U Greater consumption of caffeinated coffee or tea was associated with lower risk of dementia https://jamanetwork.com/journals/jama/fullarticle/2844764?guestAccessKey=b5f53c96-c7a8-47fa-b807-8b464361c4d8