Eating more fruits is better for health. For example, eating apples and apple juice can promote the production of acetylcholine in the brain. This substance is basically the same as the medicine for treating Alzheimer's Harmo's disease, so you can prevent Alzheimer's Harmo's disease by eating two apples a day. Longan can improve weak and inefficient insulin, and eating appropriate amount of cinnamon every day can prevent Alzheimer's disease.