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New Study: Alcohol Consumption Increases Dementia Risk, No Protection

9/29/2025

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Summary

Story summary

BMJ Evidence-Based Medicine reports that alcohol consumption raises dementia risk, challenging the view that light drinking protects brain health.
The study uses Mendelian randomization on data from 2.4 million participants to assess genetic risk linked to alcohol use.
Findings show a linear dementia risk rise with higher intake, with no protective effect at low consumption; reverse causation complicates the link.

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Story summary

BMJ Evidence-Based Medicine reports that alcohol consumption raises dementia risk, challenging the view that light drinking protects brain health.
The study uses Mendelian randomization on data from 2.4 million participants to assess genetic risk linked to alcohol use.
Findings show a linear dementia risk rise with higher intake, with no protective effect at low consumption; reverse causation complicates the link.