Metabolic syndrome (MetS) is a cluster of metabolic diseases that are linked to atherosclerotic cardiovascular disease. MetS have also been linked to increased nephrolithiasis. However, limited research has been conducted on MetS and its impact on stone specific health-related quality of life (HRQOL). This study aims to examine the hypothesis that the presence of MetS is associated with decreased HRQOL in patients who are active stone formers.