Individual Herbs Notebook

Yi Yi Ren

Pharmaceutical: Semen Coicis
Taxonomy: Coix lacryma-jobi

Other names: Job's Tears / Chinese Pearl Barley

Category: Herbs that Drain Dampness



Properties: Sweet, Bland, Slightly Cold

Meridans Entered:
Primary: Spleen, Stomach and Lung


Traditional Actions/Indications:
  1. Strengthens the Spleen and resolves Dampness
    Dampness Stagnation or Spleen Deficiency Dampness with diarrhoea, leg Qi, painful urinary dribbling
    Damp-Warmth (treats root and manifestations)
  2. Expels Wind-Dampness and relieves pain
    Wind-Damp Bi (increases joint mobility and decreases spasms in chronic cases) for stiffness of the muscles, severe arthralgia and joint immobility
  3. Clears Heat and expels pus
    Soft, pustulated carbuncles, Lung and Intestinal abscess
  4. Clears Damp-Heat
    Any Damp-Heat condition at any level with a greasy, white tongue coat and digestive problems
  5. Aids fasting
    Mentioned in the Shen Nong Ben Cao Jing as part of the superior class of herbs which can, with protracted taking, make the body light and boost the Qi. This may suggest it was part of supplementing the diet when engaging in an "avoiding grain" (Bigu 辟穀) fasting regime to cultivate life (Yangsheng 養生). At ~70% carbohydrates (Zhu, 2017), this would represent one important source of of this nutrient class which could be had in the amounts that could be foraged, as opposed to farmed, to maintain this kind of diet long term. Its root is also suggested to expel the Three Worms.

Suggested Daily Dosage: 9-30g in decoction.


Notable Constituents: The main review of constituents is provided by Zhu (2017).
Appears in 33 formulae listed on this site: (click to display)
Research Links & References: (click to display)