Chinese yam (shan yao)
On this page
1. Overview
Chinese yam — shan yao, literally 'mountain medicine' — is the rhizome of Dioscorea opposita, one of the most widely used food-medicines in Chinese cookery. It is gentle, sweet, neutral and remarkable for its three-fold tonifying action on Spleen, Lung and Kidney. It is suitable for all ages and constitutions, including children, the elderly, pregnancy and convalescence — few other Chinese tonics carry such universal indication.
2. TCM properties
- Thermal nature: Neutral
- Flavour: Sweet
- Channels entered: Spleen, Lung, Kidney
- Actions: Tonify Spleen and Stomach qi; nourish Lung yin; tonify Kidney qi and essence
3. Therapeutic uses
- Chronic loose stools, weak digestion, sluggish appetite
- Chronic cough or asthma from Lung qi deficiency
- Diabetes (helps regulate blood sugar — modern research supports)
- Lower back weakness, frequent urination
- Vaginal discharge from Spleen-Kidney deficiency
- Convalescence, postnatal recovery, paediatric weakness
- PCOS and metabolic syndrome (insulin sensitivity support)
4. How to use
- Fresh: peel and stir-fry, steam, or add to soups
- Dried (most common in Chinese herbal pharmacies): rehydrate and add to congee, soups
- Powder: stir into hot water for a daily Spleen tonic drink
- Combine with lotus seed and red date for a Spleen-supportive sweet soup
- Daily dose: 30–60g fresh, or 15–30g dried
5. Cautions
Generally exceptionally safe. Avoid in marked damp-heat patterns. Some people experience itchy hands when peeling fresh yam — wear gloves or peel under running water.
