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Brain health: Cutting out your last alcoholic drink makes a difference says new study

Heavy alcohol consumption has been associated with brain atrophy, neuronal loss, and poorer white matter fibre integrity. However, there is conflicting evidence on whether light-to-moderate alcohol consumption shows similar negative associations with brain structure.

In a study published in Nature Communications, associations between alcohol consumption and grey and white matter volumes in the brain were further investigated.

The study involved 36,678 generally healthy middle-aged and older adults from the UK Biobank.

The study found that the more a person drinks the smaller their brain and that there was less connectivity in the brain’s white matter. 

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“There is some evidence that the effect of drinking on the brain is exponential,” said Dr Remi Daviet, the study’s first author.

He added: “So, one additional drink in a day could have more of an impact than any of the previous drinks that day.

“That means that cutting back on that final drink of the night might have a big effect in terms of brain ageing.”

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In other studies, alcoholics have exhibited brain shrinkage and deficiencies in the white brain matter that carries information between cells.

Brain scans of heavy drinkers indicate that alcohol negatively affects neurotransmission, brain cell metabolism, and blood flow within the frontal lobes and cerebellum.

Even in the short term, alcohol affects areas of the brain controlling cognitive and motor functions, causing them to slow down.

Alcohol impairs memory, judgment, and coordination and disrupts sleep patterns. When used long-term, alcohol may cause permanent brain damage.

Alcohol consumption is one of the leading contributors to the global burden of disease and to high healthcare and economic costs. Alcohol use disorder (AUD) is one of the most prevalent mental health conditions worldwide with harmful effects on physical, cognitive, and social functioning.

Chronic excessive alcohol consumption is associated with direct and indirect adverse effects, including (but not limited to) cardiovascular disease, nutritional deficiency, cancer, and accelerated ageing.

Chronic alcohol use is associated with changes in brain structure and connectivity and is associated with widespread patterns of macrostructural and microstructural changes, primarily affecting frontal, diencephalic, hippocampal, and cerebellar structures.

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