Non-supplemented patients had lower rate of O2 saturation at admission (93 ± 6 vs. 95 ± 4), higher levels of CRP, higher blood urea nitrogen, and higher rates of CURB65 ≥ 3 and ARDS (moderate or severe) at admission without significative differences in neutrophil-to-lymphocyte ratio, LDH, D-dimer, ferritin, or rate of systemic corticosteroids use. Here, CRP is linked to acute respiratory distress syndrome.