At this time, there is no known way to prevent Alzheimer's disease.
Adults who are physically active may be less likely to get Alzheimer's disease or dementia than adults who are not physically active. Moderate activity is safe for most people, but it's always a good idea to talk to your doctor before starting an exercise program.
Older adults who stay mentally active may be at lower risk for developing Alzheimer's disease. Regularly reading newspapers, books, and magazines, playing cards and other games, working crossword puzzles, going to museums, and doing other social activities, and even actively watching television or listening to the radio may help you avoid symptoms of Alzheimer's disease.
CCTV health program recently reported a case who used a simple technique to heal his Alzheimer's disease. The patient found his memory lost and was diagnosed as early stage of Alzheimer's disease after a stroke. He was so worry about his future, then start to study ancient Chinese medicine to find out the technique to heal himself. After practising the technique for 20 yrs, his memory not only did not reduce but enhanced to better than he was young. Although the technique has not been proved satistically, benefit can come from regularly stimulating meriadians on the skull, according to the theory of Chinese Medicine.
Video below shows you an easy method might help for prevention of Alzheimer's disease: