Fig. 4
![Fig. 4](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs12917-021-02890-1/MediaObjects/12917_2021_2890_Fig4_HTML.png)
a Cortisol concentrations of baseline (S0) and experimental (SExp) saliva of the four groups. b Cortisol concentrations of baseline ginger (S0Ginger), experimental ginger (SExpGinger) and experimental 30s-ginger (SExp30sGinger) saliva. The horizontal line represents the median of each group. Clamps represent significant differences