As our country is aging faster and faster, the incidence of dementia is increasing. However, the medications used to treat Alzheimer’s are less effective and do little to slow the course of the disease. But some risk factors for Alzheimer’s are now known, and it may help if we pay attention to these aspects in our daily life. 1. diabetes: expected to increase the risk by 39%; 2. getting hypertension in middle age: 61% increase; 3. obesity: 60% increase; 4. depression: 90% increase; 5. reduced activity: 82% increase. Less movement also increases the risk of cardiovascular disease, while on the contrary, exercise is beneficial to the structure and function of the brain; 6, smoking: an increase of 59%. Smoking can cause vascular disease, increase inflammatory responses and expose the brain to neurotoxins, thus increasing the risk of dementia; 7, less thinking or low education: an increase of 59%. Healthy elderly people more cognitive training can slow down dementia.