You've lit upon actually the most important thing we have going right now.
If you don't want to get Alzheimer's, ladies and gentlemen, there are four things you should address immediately. One is regularly maintained exercise—just modest exercise, not a four-minute mile; an hour's gardening or an hour's housework is the same as an hour in the gym. Another is using your head by exercising your brain and involving yourself in activities. Another one is socialization, not isolating yourself but interacting. The final one is a healthy lifestyle, especially with diets and things like that. These have all been shown to significantly reduce the numbers, or advance, let's say, the time at which you get the condition, if you're going to get it, and they slow it down in people who already have it. No drug we have yet achieves that.