CST3 and metabolic syndrome: In a cross sectional study of 925 dyslipidemic patients over 10 months, Servais et al. found that circulatory cystatin-C levels were significantly higher in MetS patients than in others (0.86 ± 0.23 vs. 0.79 ± 0.20 mg/L, respectively, p < 0.0001) [91].