Coffee Reduces Risk of Alzheimer's Disease: Direct Evidence
It would be too bold a move at this point to say that drinking coffee prevents Alzheimer's disease. However, the results of a new study indicate that older adults with mild memory problems who drink a moderate amount of coffee each day will not progress to Alzheimer's disease or at least will have a significant delay before converting to this most common type of dementia.
The good news about coffee and caffeine
One of the first things to point out about this study is that it involved the use of caffeinated coffee--not decaf. In fact, the investigators measured levels of caffeine in the study participants' blood and from there determined that about three cups of coffee daily was the "magic" number needed to achieve the benefits observed in the study.
Here's what the investigators discovered among the 124 individuals ages 65 to 88 who participated in the study. The researchers focused on people with early signs of Alzheimer's disease, a condition called mild cognitive impairment (MCI), as about 15% of people with MCI progress to full-blown Alzheimer's disease each year.