In Xiang Su San, which herb is used to regulate qi?

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Multiple Choice

In Xiang Su San, which herb is used to regulate qi?

Explanation:
Chen Pi regulates qi, particularly in the middle jiao. In Xiang Su San the goal is to move qi and harmonize the stomach, so the middle-jiao qi-regulating action of Chen Pi is central: it drives qi smoothly, dispels stagnation, and also helps dry dampness to support digestion. While Xiang Fu also moves qi (especially liver qi) and Zi Su Ye disperses exterior patterns and guides qi, Chen Pi is the herb most directly focused on regulating the qi within the stomach/middle region, which is why it’s the best fit here. Gan Cao harmonizes the formula.

Chen Pi regulates qi, particularly in the middle jiao. In Xiang Su San the goal is to move qi and harmonize the stomach, so the middle-jiao qi-regulating action of Chen Pi is central: it drives qi smoothly, dispels stagnation, and also helps dry dampness to support digestion. While Xiang Fu also moves qi (especially liver qi) and Zi Su Ye disperses exterior patterns and guides qi, Chen Pi is the herb most directly focused on regulating the qi within the stomach/middle region, which is why it’s the best fit here. Gan Cao harmonizes the formula.

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