Body mass index (BMI), fasting plasma glucose (FPG), postprandial plasma glucose (PPG), insulin, HbA1c, and serum endocan levels were significantly higher in the prediabetes group (BMI: <i>p</i> = 0.003; FPG: <i>p</i> < 0.001; PPG: <i>p</i> = 0.019; insulin: <i>p</i> = 0.007; HbA1c: <i>p</i> < 0.001; endocan: <i>p</i> = 0.012). Here, INS is linked to prediabetes syndrome.