A paper entitled The relationship between alcohol use and long-term cognitive decline in middle and late life: a longitudinal analysis using UK Biobank was published last week in the reputable Journal of Public Health. The authors used data on 13,342 people who had been asked about their alcohol consumption and then given reaction time tests both at baseline and after five years, and came to the strong conclusion that “Consuming more than one UK standard unit of alcohol per day is detrimental to cognitive performance and is more pronounced in older populations”. Current guidelines are to keep to two units a day, but the authors claim that “Our findings suggest that to preserve cognitive performance 10 g/day is a more appropriate upper limit. This would translate into not more than one UK standard unit of alcohol each day”. The Times covered the story uncritically, and the Sun had this wonderful headline.