CYGB and Hyponatremia: Conversely, hyper-hypo-natremia subjects exhibited lower levels of serum magnesium (Mg, mmol/L), carbon dioxide-binding capacity (CO2-CP, mmol/L), albumin/globulin ratio (A/G), serum iron (Fe, umol/L), and hemoglobin (HGB, g/L) (P < 0.05).