Fig. 7

Inhibitory effects of menthol on the Vanillyl butyl ether (VBE)-induced sensory irritation in humans. a, c Changes in sensory irritation scores following the application of VBE (0.1 wt%) in the absence and presence of menthol (a 0.1 wt%; c 0.3 wt%) (n = 10 each). b, d Total scores of sensory irritation by VBE during 10 min in the absence and presence of menthol (b 0.1 wt%; d 0.3 wt%). *p < 0.05. Data are shown as the mean ± SEM