and the parade, i hardly messed up at all. something that was important to me was given back. >> steve: joining us right now from the west coast is ucsf clinical professor of medicine and author of "undo it." dr. dean ornish doctor, good morning to you. >> good morning, steve. thanks for having me. >> steve: this is remarkable. you never hear about anything that can improve or reverse alzheimer's and yet that's what you have found with this study. explain what you did. >> yeah. i wouldn't calling it reversing but i would say that there were improving cognition and function. we did randomized control trial we found the patients who made intensive lifestyle changes. using the four tests we measured improved cognition and function or stayed the same whereas in the randomized control group none of them improved and 68% of them actually worsened during that 20 weeks. >> steve: this is so extraordinary because youner you neverhear about people gettg