Association between coffee consumption and metabolic syndrome in Korean adults

Studies examining the association between coffee consumption and metabolic syndrome (MetS), considering different coffee types, have reported inconsistent results. We investigated the relationship between coffee consumption and MetS, taking into account coffee types, using data from the Korea National Health and Nutrition Examination Survey conducted from 2016 to 2021 among 14,631 adults aged 19–64 years. We used a 24-h dietary recall method to assess diet, including the type and quantity of coffee consumed. Coffee was categorized into black coffee and coffee with sugar and/or cream (non-drinkers, ≤1, 2–3, and >3 cups/day). Multivariable logistic regression models were utilized to investigate the relationship between coffee consumption and MetS, defined by the harmonized criteria. After adjusting for potential covariates, for women, 2–3 cups/day of black coffee were inversely associated with MetS (OR = 0.66; 95% CI = 0.46–0.96). Three or fewer cups per day of black coffee were inversely associated with low high-density lipoprotein cholesterol (HDL-C) and elevated triglycerides in women. Coffee consumption was not significantly associated with MetS in men. Consumption of coffee with sugar and/or cream or more than three cups per day of coffee was not significantly associated with MetS overall. Our findings suggest that moderate of 2–3 cups/day of black coffee consumption is inversely associated with MetS in women, possibly due to its favorable impact on HDL-C and triglycerides. Further prospective studies examining the consumption of different coffee types in relation to MetS are warranted to offer definitive evidence.