Bitter Orange Fruit
枳壳 · zhǐ ké
Opens stuck qi in the chest and gut
What it does
Bitter orange appears as zhi ke (nearly ripe) and zhi shi (immature). Both move stuck qi, your body's vital energy, breaking up accumulation and transforming phlegm. Zhi ke governs the chest and diaphragm; zhi shi governs the abdomen and helps with constipation. Both appear in formulas for digestive stagnation, including Bupleurum Spread the Liver (Chai Hu Shu Gan San).
Safety
- Use with caution during pregnancy. Strongly moves and descends qi.
- Not for Spleen and Stomach deficiency without qi stagnation.
- Concentrated synephrine extracts carry more risk than the whole dried fruit.
- Do not stack synephrine extracts with caffeine if you have heart or blood pressure problems.
- Bitter orange contains synephrine and furocoumarins that may affect CYP3A4 metabolism; use caution with medications processed by this pathway.
How to take it
Decoct 3–9g of dried bitter orange fruit in 4 cups water for 30 minutes. Often combined with other qi-regulating herbs rather than taken alone.
Best used as part of a formula for digestive qi stagnation or chest tightness
Follow the product label for the formula containing zhi ke or zhi shi. Standalone preparations exist but are most effective in combination.
Look for it in qi-regulating or digestive support formula products
Where it comes from
Zhi ke comes from bitter orange (Citrus aurantium); zhi shi is the unripe fruit of bitter or sweet orange. Wang Hao-Gu's saying that 'zhi ke governs the heights, zhi shi governs below' has guided clinicians for centuries in choosing between them. The immature fruit's stronger descending action made it standard for constipation; the nearly ripe fruit's gentler quality suited the chest. They remain distinct in practice, with zhi shi the more forceful of the two.