Jack Bean

Traditional Use

Primary Actions

• Warms the middle and directs qi downward - Dao Dou is classically used for hiccup, nausea, belching, and weak cold digestion with counterflow.
• Supports Kidney yang and lower-back weakness - traditional use extends beyond digestion to low-back discomfort and constitutional weakness with coldness.
• Helps regulate qi and relieve pain - official pharmacopoeial descriptions include stomach-cold distention and constrained pain patterns.

Secondary Actions

• Dao Dou is a true food-medicine bean: the immature pod is edible as a vegetable, while the mature seed is the medicinal entry here.
• Because the plant is rich in lectins and canavanine-related compounds, proper processing matters and the medicinal seed should not be romanticized as a harmless snack.

Classic Formulas

• Dao Dou powder or decoction for hiccup - classic folk and materia medica use when middle-cold causes stubborn upward qi.
• Dao Dou with Sha Ren or Sheng Jiang - warming-middle strategy for nausea, poor digestion, and weak descent.
• Kidney-warming combinations with Du Zhong or Xu Duan - traditional logic when low-back weakness accompanies cold middle-burner patterns.

Classical References

• Pharmacopoeial and reference sources describe Dao Dou as sweet and warm, entering the Stomach and Kidney to regulate qi, warm the middle, and assist yang.
• The standard indications include stomach-cold distention, hiccup, vomiting, and lower-back weakness.
• Later summaries also preserve chronic dysentery, amenorrhea, and throat complaints among its broader ethnomedical uses, though those are less central than the descending-qi role.