Alcohol and dementia risk: how much is too much?

I've always heard that a glass of wine a day is actually good for you. Is that true — or does alcohol increase the risk of dementia?

The idea of 'a glass of wine that does good' is outdated in public health. The current WHO position is clear: due to its psychoactive, toxic, and dependence-inducing nature, alcohol should not be recommended in any quantity for health reasons. This doesn't mean an occasional glass is a disaster — it means no one should drink 'because it's good for you', because it isn't.

What the guidelines say about dementia

To reduce the risk of cognitive decline and dementia specifically, WHO recommends interventions aimed at reducing or ceasing hazardous and harmful alcohol consumption — including support for people with dependence (conditional recommendation, with moderate certainty, one of the most solid in the document). Excessive and prolonged alcohol consumption is directly toxic to the brain, in addition to the vascular damage it adds.

What is 'harmful consumption'?

There isn't a universal magic number, but the practical signs are recognisable: drinking every day in quantity, needing alcohol to relax or sleep, regular episodes of drunkenness, or someone close having already expressed concern. If any of these phrases sound familiar, it's worth an honest conversation with your GP — without judgment, it's a health topic like any other.

In practice

If you drink little and occasionally, there's no cause for alarm — but don't increase 'for your health', because that benefit doesn't exist. If you drink daily, reducing is one of the changes with the best return for your brain. And if you feel it's difficult to do alone, the NHS has support for this: your GP is the right point of entry.