shan yao

山药·Rhizoma Dioscoreae

common yam rhizome

About shan yao

Shan Yao (山药) is the rhizome of the common yam, recorded as Rhizoma Dioscoreae. It is sweet in flavour and neutral in temperature, entering the Lung, Spleen and Kidney channels. The catalogue files it among the herbs that tonify Qi.

Names

Pinyinshan yao
Chinese山药
Latin NameRhizoma Dioscoreae
English Namecommon yam rhizome·Dioscorea Rhizome·Dioscoreae Rhizome
Japanesesanyaku
Koreansanyak

Classification

Category
Tonify Qi
Channels
Lung, Spleen, Kidney
Flavour
Sweet
Temperature
Neutral
Part used
Vegetable
Family
Dioscoreaceae
Species
Dioscorea opposita
Tags
Chinese Herbs, Common

Actions and indications

Tonifies Spleen and Stomach Qi and Yin and stops diarrhea

  • Spleen or Stomach deficiency with loose stools or diarrhea, tiredness, poor appetite, spontaneous sweating, bloating after meals and a pale tongue; may be used alone in larger amounts

Tonifies Lung Qi and Yin

  • Chronic cough and wheezing from Lung Qi or Yin deficiency; where Yin deficiency predominates, sputum is scant or sticky

Nourishes Yin and treats wasting and thirsting disorder

  • Xiao Ke (wasting and thirsting disorder) from Qi and Yin deficiency; nourishing and mildly astringent without being drying, and usable alone in larger amounts

Tonifies Kidney Qi and Yin and secures Jing

  • Kidney deficiency with spermatorrhea, frequent urination and vaginal discharge

Combinations

Dosage

AgeRawGranuleTinctureConcentrateFrequency
Any 9-30g; Large dosage: 60-240g; Diabetes: up to 250g; Tincture: 2-4ml9-30 g2-4 ml

Cautions

Interactions

Antagonistic with

Drug interactions