Yin Xing Ye (银杏叶; Yín Xìng Yè; Latin: Folium Ginkgo; English: ginkgo leaf) is the dried leaf of the ancient ginkgo tree, gathered in autumn while the leaf is still flexible and not yet fully yellowed, with raw and honey-processed as the common forms. It is neutral, bitter, and astringent, enters the Heart and Lung channels, and its core actions are to clear and unblock stagnant qi and blood, and to harmonize the lung and spleen flow. The usual amount is 5–10 g a day. It is usually steeped as a tea rather than long boiled; a brief simmer of about 5 minutes is enough.
It is not Ci Wu Jia. Ci Wu Jia is warm, sweet, and slightly bitter, enters the Spleen, Lung, and Kidney channels, and warmly tonifies spleen-kidney qi while settling the mind. Yin Xing Ye is neutral and bitter-astringent, clearing and harmonizing stagnation without adding to the body's resources. It is not the ginkgo nut, Bai Guo, which is a different part of the same plant. Use caution in pregnancy and while nursing. Clear qi deficiency, with fatigue and shortness of breath, and a cold constitution with cold limbs and loose stools are poor matches. Do not take it daily long-term on your own.
It is used most often for three patterns:
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Chest stuffiness and palpitations from disharmony of qi and blood — seek care
- Heavy limbs, sluggish body, and a thick tongue coating from mild metabolic imbalance
- Mild lung-spleen imbalance — light cough, bloating, and loose stools
Neutral, bitter, and astringent, it is not a daily "circulation leaf" to keep taking. Clearing and astringing when there is clear qi deficiency or a cold body worsens the cold and drags the flow down further.
When qi and blood flow sluggishly and the lung and spleen are slightly out of step, chest stuffiness, heavy limbs, and a light cough or loose stools are common. Yin Xing Ye is neutral, bitter, and astringent. It clears stagnation and harmonizes the flow, which is why it appears in Yin Xing Ye Pian–type and Yin Xing Ye Tang–type formulas. It tidies more than it builds. A clearly qi-deficient or cold body, with fatigue and cold limbs, gets worse if more is added.
Yin Xing Ye is not a catch-all circulation leaf. In clear qi deficiency, a cold constitution, or in pregnancy, using it alone is a poor match. Raw or honey-processed, and whether it belongs in a formula, should be decided by a licensed Chinese medicine practitioner after pattern diagnosis.