When analyzing iron-related indicators, hepcidin concentrations were significantly higher in subjects who were both overweight (median 14.3 vs. 28.0 ng/mL; p < 0.001) and had abdominal obesity (median 18.0 vs. 23.6 ng/mL; p = 0.036) compared to lean participants, while serum iron levels did not differ significantly (data not presented). This evidence concerns the gene HAMP and Abdominal obesity.