LEP and metabolic syndrome: Low levels of leptin were found in MHO individuals, however they were classified; leptin values were significantly lower in MHO-MetS compared to MUO-MetS (34.0 ± 19.0 vs. 27.9 ± 21.4 ng/mL; p = 0.01), and in MHO-IRes compared to MUO-IRes (20.1 ± 13.9 vs. 33.9 ± 20.4 ng/mL; p < 0.01).