Individual Herbs Notebook

Yu Yu Liang

Translation: Yu's Surplus Provisions

Pharmaceutical: Limonitum
Chemical Formula(e): FeO(OH)⋅nH2O

Other names: Limonite / Hydrated Ferric Oxide

Category: Herbs that Stabilize and Bind



Properties: Sweet, astringent, neutral

Meridans Entered:
Primary: Stomach


Traditional Actions/Indications:
  1. Astringes the Intestines and stops diarrhoea
    Chronic diarrhoea or dysentery disorders
    Instability of the Lower Jiao with diarrhoea to the point of incontinence
    Spleen and Kidney Yang Deficiencies diarrhoea especially in the elderly
  2. Restrains leakage of Body Fluids and inhibits and stops bleeding
    Incessant vaginal discharge
    Unrelenting uterine bleeding
  3. Aids fasting
    Mentioned in the Shen Nong Ben Cao Jing as part of the superior class of minerals which can, after sublimation, make one free from hunger, make the body light and prolong life. 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). Unusually, a second entry for Tai Yi Yu Yu Liang (太一禹馀粮, "Supreme Unity of Yu's Surplus Provisions"), possibly the sublimated version, is given, whose effects with prolonged taking are to resist cold and summerheat, prevent hunger and make one an immortal with a body so light it is able to fly a thousand li.

Suggested Daily Dosage: 10-20g in decoction.


Cautions: Use with caution for pregnant women.

Mineral products are prohibited from use in the UK under the Medicines Act 1968 ch. 67 which restricts herbalists to the use of plant products only.


Appears in 3 formulae listed on this site: (click to display)
Research Links & References: (click to display)