Bariatric surgery may slow cognitive decline for people with obesity, a new study shows.

New research adds to a growing evidence that sports that involve repeated blows to the head may lead to dementia.

Smoking shrinks the size of your brain. Quitting smoking prevents further loss of tissue, but can't restore the brain to its original size.

Dementia affects more than the brain. A new study shows the toll it takes on a person's wallet—and on family caregivers, too.

Older adults who spend a lot of time engaging in sedentary behavior like sitting around watching TV may have a higher risk of dementia.

A protein in spinal fluid in healthy adults predicted later onset of mild cognitive impairment and dementia years before symptoms.

Wildfires and agriculture and farming emissions may be the top sources of air pollution linked to increased risk of dementia, research finds.

Black Americans are less likely to receive special care for Alzheimer's, despite being twice as likely to develop dementia as white people.

When a fragrance wafted through the bedrooms of older adults for two hours every night for six months, memory skyrocketed, researchers say.

Most older adults see the benefits of Alzheimer's screening, but only one in five have been tested in the past year, according to a new poll.