You've seen the commercials--"A mind is a terrible thing to waste." Most of us agree, yet many people wander off into their later years leaving their minds behind. You probably know of someone who is suffering from Alzheimer's disease--a debilitating condition that robs otherwise healthy people of their mental capacities. What can be done to prevent Alzheimer's from taking your mind?The brain is less than 2% of one's body weight yet it controls every aspect of life. Networks of blood vessels del.