APOB and metabolic syndrome: According to the 2011 European Society of Cardiology (ESC)/EAS guidelines for dyslipidemia management, high-density lipoprotein cholesterol (HDL-C), TC, Apo B, and Apo A1 levels can be assayed in non-fasting samples, whereas TG levels and LDL-C, which is calculated by the Friedewald formula should be assessed in fasting samples (39).