Preliminary, observational evidence suggests that risk of Alzheimer disease may be decreased by the following:

- Continuing to do challenging mental activities (eg, learning new skills, doing crossword puzzles) well into old age

- Exercising

- Controlling hypertension

- Lowering cholesterol levels

- Consuming a diet rich in omega-- fatty acids and low in saturated fats

- Drinking alcohol in modest amounts

However, there is no convincing evidence that people who do not drink alcohol should start drinking to prevent Alzheimer disease.