Gong Lao Ye (功劳叶; Gōng Láo Yè; Latin: Ilicis Cornutae Folium; English: Chinese holly leaf) is the dried leaf of the Chinese holly shrub — the thick, spiny-edged evergreen of southern courtyards, called the "leaf of merit" for its recorded value in Chinese medicine. It is cold and bitter, enters the Liver and Kidney channels, and its core actions are to clear deficiency heat, and to tonify the liver and kidney. It is the autumn herb for low-grade heat in a tired body. The usual amount is 6–10 g in a decoction. It does not need first, last, or wrapped decoction handling, and it can go into tea or porridge.
It is not Di Gu Pi. Wolfberry root bark is cold, sweet, and bland, and it clears lung heat and deficiency heat — but it has almost no tonifying side. It is not the ordinary garden holly of folklore either; the medicinal leaf is the specific Chinese holly, dried and checked. In a cold weak spleen-stomach — frequent loose stools, a cold-loving stomach — or in pregnancy, using it on your own is a poor match. Night fevers that keep climbing, or pain that will not settle, needs a clinic first. Do not take it yourself for a long time.
It is used most often for three patterns:
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Afternoon or night fever, warm palms and soles, a restless mind at night — deficiency heat
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Weak lower back and knees, dizzy vision, dry eyes — liver-kidney insufficiency
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Cold weak spleen-stomach with frequent loose stools — skip it
Cold and bitter, it is not a daily "heat-clearing tea" to keep increasing. Clearing and tonifying when there is no deficiency heat, or in a cold weak spleen-stomach, chills the middle instead of helping.
When liver-kidney yin runs low — from late nights, overwork, or age — deficiency heat rises from within: afternoon fevers, warm palms, a restless mind at night — and the lower back and knees tire easily. Gong Lao Ye is cold and bitter. It clears the heat and builds the yin, which is why it appears in Zi Shen Qing Gu Tang (Nourish the Kidney and Clear Bone-Heat Decoction)–type formulas. It clears more than it drains. In a cold weak spleen-stomach, more makes it worse.
Gong Lao Ye is not a catch-all heat or tonic herb. In a cold weak spleen-stomach, in pregnancy, or with no deficiency heat, using it alone is a poor match. Whether it belongs in a formula, and at what dose, should be decided by a licensed Chinese medicine practitioner after pattern diagnosis.