How bad is it to drink alcohol once a week?
                                
                                
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                                    6 min read                                
                            
                                A recent 2025 study published in *BMJ Evidence-Based Medicine* found that even light drinking, defined as one to three drinks a week, is linked to a higher risk of dementia and brain damage. This finding challenges the widely-held perception that occasional alcohol consumption is entirely harmless and highlights the importance of understanding the true health implications of weekly drinking habits.