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People at risk for type 2 diabetes are also more likely to have brain abnormalities associated with Alzheimer's disease, according to a new study from Japan. The study is the latest evidence of a diabetes-dementia link.

The researchers found that men and women in their 60s with higher-than-average levels of blood sugar (glucose) or insulin -- two signs of type 2 diabetes -- are between three and six times more likely to have certain protein deposits in their brains a decade or more later, according to the study, which appears in the journal Neurology.

Alzheimer's disease affects as many as 5 million people in the U.S., and the cause is largely unknown (although genes play a role). About 24 million people in the U.S. have diabetes, and about 90 percent of those have type 2.

Drinking wine in moderate amounts may reduce the risk of decline in thinking skills in some people and may even protect against dementia, a new study shows.

women who reported drinking wine at least four times over a two-week period were at reduced risk of scoring poorly on the tests, compared with women who had less than one drink during the period. In addition, women who didn't drink any alcohol scored lowest on the tests. The average age of people in the study was 58, and none had suffered a stroke.

Regular exercise could help prevent brain damage associated with neurodegenerative diseases like Alzheimer's, according to research published this month in Elsevier's journal Brain, Behavior, and Immunity. "Exercise allows the brain to rapidly produce chemicals that prevent damaging inflammation", said Professor Jean Harry, who led the study at the National Institute of Environmental Health Sciences in the United States. "This could help us develop a therapeutic approach for early intervention in preventing damage to the brain."

exercise before the onset of damage modifies the brain environment in such a way that the neurons are protected from severe insults.

exercise could be used to affect the path of many human conditions, such as neurodevelopmental disorders and neurodegenerative diseases. In addition, as a chemical model of neuronal damage was used, it also raises the possibility that exercise could offer protection against the potentially harmful effects of environmental toxins.