dr. dale bredesen. he wrote a book called "the end of alzheimer's." >> two years ago, i scored mildly cognitively impaired on a cognitive assessment test. and most recently, i scored perfect, and i'm really happy about that and claiming it. >> dr. sally weinrich, a former cancer researcher and grandmother, followed the bredesen protocol and is able to cook once again for her large family, pick up the grandkids from school, and she's learning spanish. >> over a period of, i would say, four to six months, the symptoms i was experiencing all reversed, and i returned to my cognitive functioning that had been sort of my norm when i was younger. >> deborah recovered her ability to sight-read notes when she plays the piano. she also regained the ability to help her active family of four while working a high-powered job, and she no longer has facial blindness, which meant she couldn't recognize people she knew. adda, an active grandmother, told me by skype that she improved her ability to think clearly, and she