Scientists Tracked 130,000 People for 43 Years and Found the Optimal Coffee Amount for Brain Health In A Nutshell Two to three cups of caffeinated coffee or one to two cups of tea daily showed the strongest protection against dementia;

Nuts and legumes, especially tree nuts like walnuts, which research shows can cut dementia risk. Wang said supplements can also help. But they're not all created equal. He suggested fish oil, carotenoid supplements and a good multivitamin as the best for brain health.

One type of cognitive training appears to reduce the risk of dementia 20 years later. Even a modest amount of mental exercise appears to reduce the risk of dementia for decades. NPR's John Hamilton reports on a new study of people who did a specific type of cognitive training more than 20 years ago.

Scientists have identified a type of mental exercise focused on processing speed that could cut people’s risk of developing dementia in later life by 25 per cent, an advance that may lead to new interventions for the elderly.

We don’t experience depression uniformly, and a new study finds that some symptoms may be more strongly linked with developing dementia later in life.