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Results from two new studies say yes, although the second one begs the question "what constitutes 'moderate' drinking?"

The first article is from News Fix:

People who consume between one and six drinks a week have about half the risk of dementia, compared to abstainers.

Alcohol has a number of effects on the brain and its blood vessels so it is unsurprising to learn that levels of consumption may be associated with the risk of dementia. Researchers at the Beth Israel Deaconess Medical Center compared 373 people with new-onset dementia with 373 controls drawn from Cardiovascular Health Study, which covers 5,888 adults aged 65 and older.

Compared to abstainers, those consuming less than one drink a week had a 35 per cent lower risk of dementia, and those consuming between one and six drinks a week had a 54 per cent lower risk. A consumption of between seven to 13 drinks a week was associated with a 31 per cent lower risk. And those consuming more than 14 drinks a week were found to have a 22 per cent increased risk of dementia. The increased risk was most apparent among men carrying the ApoE4 gene, itself a risk factor for dementia.

The link between alcohol consumption and dementia risk was generally similar for both vascular dementia and Alzheimer’s disease. It ties in with other research that shows light to moderate alcohol consumption may confer some benefit on brain function, while heavy consumption impairs it.

Link to News Fix.

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