Moderate drinking could help to prevent older people developing Alzheimer's disease but hasten the decline of people who already have cognitive problems. Researchers at Wake Forest University School of Medicine in North Carolina studied 3,069 adults. Among those who were cognitively normal at the start of the study moderate drinkers (those who had 1 or 2 drinks a day) appeared to be protected against dementia. However, for those people who were already suffering from mild cognitive impairment at the start of the study heavy alcohol use (more than 14 drinks a week) nearly doubled the risk of dementia compared to not drinking at all.
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