Abstract Introduction Alcohol consumption is a prevalent aspect of social and cultural life worldwide. However, high and binge consumption has become a significant public health concern. Inadequate health literacy (HL) may contribute to poor awareness and/or knowledge regarding the risks of alcohol-related behaviors. However, to date, only a few studies have examined the relationship between HL and different types of alcohol consumption. This study aimed to investigate the relationship between HL, other sociodemographic determinants, and their influence on high and binge consumption among the general population aged 18-69 in Tuscany. Methods The study analyzed data from 2017 to 2022 from a Tuscan population subsample in the Italian Behavioral Risk Factor Surveillance System PASSI. HL was assessed using the Italian version of the six-item European Health Literacy Survey Questionnaire (HLS-EU-Q6). Results Among the 12,953 interviewees, binge drinking was reported by 8.3%, while high consumption by 3.6% of the entire sample. In the multivariate logistic regression, participants aged between 50 and 69 years with problematic or inadequate HL levels had an increased adjusted odds ratio for high alcohol consumption. Instead, females, individuals older than 34 years, and those of foreign nationality had a reduced odds ratio for binge drinking. Low HL was a predictor of high alcohol consumption but not of binge drinking. Discussion As expected, young males are more likely to engage in binge drinking, while older individuals are more likely to have high consumption. In a challenging period for healthcare system sustainability, it is mandatory to use economic resources efficiently and target the right population with tailored interventions: given that HL impacts on high consumption, research and policy should focus HL interventions specifically on high alcohol consumers. Conversely, educational campaigns aimed at increasing HL in binge drinkers risk to have a lesser impact. Key messages • Health literacy does not influence binge drinking. • Inadequate levels of health literacy predict high alcohol consumption.
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