A new study suggests that people who live with a smoker for more than 30 years are about 30% more likely to develop dementia than those who have never lived with a smoker.

Low-dose aspirin may not help women aged 65 and older keep their brains sharp as they age, researchers report in BMJ.

A diet rich in DHA, a type of omega-3 fatty acid, may prevent or slow Alzheimers disease, say UC Davis researchers.

Structural changes in the brain -- namely, loss of volume in certain brain areas -- may happen years before memory loss, scientists say.

The worldwide cost of dementia care topped $315 billion in 2005, researchers report in Alzheimers & Dementia.

The award-winning actress reveals how she faced her mothers Alzheimers and a role in a movie based on the disease. Plus, how she dealt with her own osteoporosis diagnosis.

Alzheimers disease is rising rapidly in America -- now affecting at least 5.1 million and expected to hit 7.7 million by 2030; perhaps tripling to 16 million by 2050.

A diagnosis of Alzheimers disease is typically delayed by nearly three years from the start of symptoms, a poll shows.

Lonely individuals are twice as likely to be diagnosed with Alzheimers disease as those who are not lonely, according to a new study.

A longevity gene credited with long life may also help older people think clearly and preserve their memories -- offering new clues about the agingaging process.

A newly identified imaging compound that shows how Alzheimers disease ravages the brain could lead to better tools to diagnose the disease and better ways to evaluate new treatments.

The sex hormone testosterone may help guard against Alzheimers disease, based on lab tests in mice.

Telltale proteins in fluid around the brain and spinal cord may lead to a new test for Alzheimers disease.

Telltale proteins in fluid around the brain and spinal cord may lead to a new test for Alzheimers disease.

Dementia may be set to rise as more people live longer, a study shows.

A marijuana-like compound may cut brain inflammation and slow the progression of Alzheimers disease, scientists report.

The FDA approved Aricept to treat severe Alzheimers dementia, making Aricept the first and only drug approved for all stages of Alzheimers dementia.

The antipsychotic drugs Zyprexa, Seroquel, and Risperdal may help some Alzheimers patients, but their side effects should be carefully weighed, a new study shows.

Two new studies offer preliminary evidence that dietary choices could help prevent age-related mental decline or slow its progression.

THC, the key compound in marijuana, blocks Alzheimers plaques better than currently approved drugs, a Scripps Research study shows.