The Dukan diet was designed by Dr. Pierre Dukan, a nutritionist and eating behavior specialist having 35 years of experience in clinical nutrition. The Dukan diet is very similar to the system of HyperProtein.
The diet included low amounts of high-fat dairy products, red meat, organ meat, and butter. Foods in this diet that appeared to fight Alzheimer's disease were salad dressing, nuts, fish, poultry, tomatoes, fruits, and cruciferous and dark and green vegetables. Researchers say the combination of nutrients and foods in this particular dietary pattern may fight Alzheimer's in a variety of ways.
1 You can tame a sweet tooth with healthier options like fruit or juice-sweetened baked goods. But note that in the later-stages of Alzheimer's, if loss of appetite is a problem, adding sugar to foods may encourage eating.  Limit foods with high sodium and use less salt.