Fig. 4

Effects of different licorice quality grades on reducing LPS-induced cytokine and chemokine production. Supernatants were collected for measuring a IL-1β and b TNF-α levels via ELISA. Data are presented as the mean ± standard mean error (n = 3). *P < 0.05, **P < 0.01, ***P < 0.001, and ****P < 0.001 vs. Con group; #P < 0.05, ##P < 0.01, ###P < 0.001, and ####P < 0.0001 vs. LPS group. IL, interleukin; LPS, lipopolysaccharide; TNF, tumour necrosis factor