IL13 and asthma: Administration of ascorbic acid and calcitriol in effective doses significantly decreased IL-13 levels in comparison with the asthma group (42.73 ± 0.27 vs. 50.5 ± 1.85 pg/mL, p = 0.009 and 43.24 ± 0.37 vs. 50.5 ± 1.85 pg/mL, p = 0.04, respectively) (Figure 2).