The chemical composition contains volatile oil and fatty oil, and the volatile oil contains α-,β-hexenal and β-,γ-hexenol, etc. Fat oil contains a lot of erucic acid, linoleic acid, linolenic acid and erucic glyceride. It also contains sulforaphane and sulforaphane.

Taste: Ping, Xin and Gan.

Meridian tropism: meridian tropism of lung, spleen and stomach.

Indications: digestion, abdominal distension, lowering qi and resolving phlegm. Used for dyspepsia, epigastric pain, constipation, diarrhea, excessive phlegm, asthma and cough. Entering the spleen, stomach and lung meridians can help digestion and eliminate abdominal distension, with remarkable effect, and is known as "rushing to the wall and falling to the wall". Clinical practice is used to treat excess (food, dampness and stagnation) syndrome. However, this product can not only help digestion and abdominal distension, but also treat deficiency syndrome with good effect. Because of its peaceful nature, no pungent smell and no harm, it can't be confined to the theory of "hitting the wall", and it is suspected of breaking the gas (in fact, it is more than flat gas), so it should be abandoned.

There is basically no diuretic effect, and plantain seeds can diuretic.

Usage and dosage: decoct, generate phlegm 6- 10g, stir-fry and promote digestion, regulate qi and eliminate phlegm.

Caution: This product is pungent, gas-consuming, and should be used with caution for those who have food stagnation and phlegm turbidity. Not suitable for use with ginseng.