Substances the Calm the Spirit

Besides calming the spirit, what is another important action of Suan Zao Ren (ziziphi spinoase semen)?

The name Suan Zao Ren means "Sour Date Seed". It is sour in flavor, so it can induce astringency to stop leakage of sweat.

Source: Bensky, D. (2004). Chinese Herbal Medicine: Materia Medica. Seattle, WA: Eastland Press. pp. 928 [Q1177]