How do you prevent alzheimer's disease?

Not really. Unfortunately scientists still do not know the exact cause and how to prevent it. Even very intellectual people may get it. (i.e.Ronald reagan). Due to the plasticity of the brain we may increase the number of glial cells and connections between brain cells by exposure to new challenges and to complex issues : learning new languages, travel, learn something new, do something new & difficult for you.
Exercise. The only intervention with a moderate amount of evidence is exercise. General priniciples for brain health include avoiding head injuries (and sports or activities associated with them), successfully managing any chronic health problems like diabetes and high blood pressure. A generalization is that if it is good for heart health, it is probably also good for your brain.
It is unknown. The only intervention with a moderate amount of evidence is exercise. General priniciples for brain health include avoiding head injuries (and sports or activities associated with them), successfully managing any chronic health problems like diabetes and high blood pressure. A generalization is that if it is good for heart health, it is probably also good for your brain.