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People who abstain from alcohol in middle age may have higher risk of dementia

09/08/2018

Alcohol and the amount people drink is the frequent focus of medical studies. However, studying alcohol consumption often results in mixed findings. For example, while drinking too much alcohol can result in liver disease and high blood pressure, other studies have shown that a glass of beer or wine a day can help people live longer. [Related reading: Drinking alcohol while breastfeeding: new study shows possible child cognitive development impact] Now a new study suggests people who abstain from alcohol in middle age may have a heightened risk of dementia later in life. The long-term study, which tracked the health of more than 9,000 civil servants in London, found that middle-aged people who drank over the recommended alcohol limit each week and those who abstained completely were more likely to develop dementia. Specifically, abstinence in midlife was associated with a 45% greater risk of developing dementia compare to people who drank between one and 14 units of alcohol per week. But before you reach for a glass of wine, it should be noted that early life alcohol consumption was not taken into account for the study. People who are teetotal in midlife may have a history of heavy alcohol consumption in their younger years. Indeed, Dr Sara Imarisio, the head of research at Alzheimer’s Research UK, said: “As this study only looked at people’s drinking in midlife, we don’t know about their drinking habits earlier in adulthood, and it is possible that this may contribute to their later life dementia risk.” The results of the study were recently published in the British Medical Journal (BMJ).

Drinking alcohol affects the bacteria in a person’s mouth

26/04/2018

Individuals who routinely drink more than one alcoholic beverage every day have an overabundance of bad bacteria and less good bacteria in their mouths, a new study has found. Compared to their non-drinking peers, drinkers have less good, such as Lactobacillales that help protect your gums, and more bad bacteria, such as certain Actinomyces, Bacteroidales, and Neisseria species that can lead to gum disease, heart problems and even some cancers. [Related reading: Regular excess drinking found to shorten life expectancy] Publishing their findings in the science journal Microbiome, the study authors said the acids found in alcoholic drinks could make the oral environment hostile for certain bacteria to grow, hence the lower number of so-called good bacteria. For the study, a group of more than 1,000 individuals had their saliva tested. The group included 270 non-drinkers, 614 moderate drinkers and 160 heavy drinkers. The results show that the drinkers had more Bacteroidales, Actinomyces and Neisseria species of bacteria, all potentially harmful, as well as fewer Lactobacillales, a family of bacteria associated with a reduction of gum inflammation. Talking about the findings of the study, Jiyoung Ahn, the study's senior investigator and an epidemiologist at the NYU School of Medicine, said: "heavy alcohol intake is a known risk factor for multiple chronic diseases, including cancers (head and neck, esophagus, colon and breast), liver disease and cardiovascular diseases."

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