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There is a large body of evidence to suggest that omega-3s are beneficial for brain health and heart health. A new study evaluated omega-3 supplements and their effect on cognitive performance. The findings supported established health benefits of these supplements.
The researchers concluded that supplementation with omega-3 polyunsaturated fatty acids (PUFA) could postpone the onset of metabolic disorders and associated declines in cognitive functioning. 
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Researchers compared vitamin E levels in Alzheimer's, mild cognitive impairment, and cognitively normal subjects.
Individuals with cognitive impairment or Alzheimer's had lower blood levels of vitamin E.
The study concluded that both disorders were associated with increased vitamin E damage. Low plasma tocopherols and tocotrienols levels are associated with increased odds of MCI and AD.
Neurobiol Aging. 2012 Oct;33(10):2282-90. Epub 2011 Dec 20.
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A study at the University of Toronto on a handful of people with suspected mild Alzheimer’s disease (AD) suggests that a device that sends continuous electrical impulses to specific “memory” regions of the brain appears to increase neuronal activity.
Results of the study using deep brain stimulation, a therapy already used in some patients with Parkinson’s disease and depression, may offer hope for at least some with AD, an intractable disease with no cure.
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By turning off an immune system transmitter in mice with an Alzheimer’s-like condition, scientists have been able to greatly reduce the accumulation of an abnormal protein known as amyloid-ß in the animals’ brains.
Previous studies have shown that the protein plays a central role in Alzheimer’s disease. It is hoped that the research may ultimately point the way towards a method of preventing or treating the disease in humans.
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People who keep their teeth and gums healthy with regular brushing may have a lower risk of developing dementia later in life, according to a U.S. study.
Researchers at the University of California who followed nearly 5,500 elderly people over an 18-year-period found that those who reported brushing their teeth less than once a day were up to 65 percent more likely to develop dementia than those who brushed daily.
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