Fruits and seedsQi-regulatingFructus Aurantii

Zhi Ke (Bitter Orange)

枳殼 · Zhi Ke

Qi-regulating herb in Traditional Chinese Medicine. Traditional functions: Moves qi, expands the center, moves stagnation, eliminates swelling.

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Quick Facts

Latin NameFructus Aurantii
Chinese Name & Pinyin枳殼 · Zhi Ke
Medicinal PartFruits and seeds
Efficacy CategoryQi-regulating
Botanical OriginThe dried immature fruit of Citrus aurantium L.(Rutaceae), and its cultivars.
Nature & FlavourAcrid, Bitter, Sour; Warm
Channels EnteredSpleen, Stomach, Large Intestine

What Is Zhi Ke?

Zhi Ke (Bitter Orange) is a medicinal herb of Traditional Chinese Medicine.

Primarily produced in the Chinese provinces of Sichuan, Hunan, Jiangxi.

Nature & Flavour: Acrid, Bitter, Sour; Warm
Channels Entered: Spleen, Stomach, Large Intestine

Zhi Ke: Materia Medica Profile

Identification & Quality Standard

Fructus Aurantii

Botanical Origin

The dried immature fruit of Citrus aurantium L.(Rutaceae), and its cultivars.

Production Regions

Primarily produced in the Chinese provinces of Sichuan, Hunan, Jiangxi.

Quality Requirements

Superior medicinal material has greenish-brown exocarp, thick flesh, hard texture, potent aromatic odor.

Macroscopic Features

Semi-spherical, 3~5.5cm diameter. Exocarp is greenish-brown or brown, slightly rough, scattered numerous small oil ducts, center has obvious scars of stigma base or round scar of fruit stem. Mesocarp of cut surface is 0.6~1.2cm thick, yellowish-white and relatively smooth, slightly rolled over, scattered vascular bundles, edges have 1-2 rows of brownish-yellow oil ducts. Hard texture, hard to break, 7~12 sections of pulp, a few have 15 pulp sections, inside pulp is dry and wrinkled, brownish-yellow or dark brown, soft texture, seeds are stored inside. Axis is firm, 5~9mm wide, yellowish-white, with one round of intermittent vascular bundle spots. Aromatic odor, bitter, slightly sour taste.

Traditional TCM Properties

Acrid, Bitter, Sour; WarmSpleenStomachLarge Intestine

Traditional Functions

Moves qi, expands the center, moves stagnation, eliminates swelling.

How Zhi Ke Is Used in TCM

In the Chinese materia medica, Zhi Ke is classified among the Qi-regulating herbs. It appears in 14 classical formulas in our library.

Formulas containing Zhi Ke are traditionally used for:

Hypochondriac DistensionBloatingEmotional DepressionChest TightnessAbdominal PainConstipationPoor AppetiteNauseaCoughExcessive MucusNasal CongestionFever

Classical Formulas Containing Zhi Ke

+8 more

Frequently Asked Questions

What is Zhi Qiao? Are Zhi Shi, Chen Pi and Qing Pi the same?
Official Zhi Qiao (枳壳) is the dried unripe fruit of Citrus aurantium and its cultivars, cut in half while the peel is still green. The pharmacopoeial name is Aurantii Fructus. Zhi Shi is the still younger fruit, stronger at breaking qi and reducing accumulation. Chen Pi is ripe tangerine peel: regulates qi, strengthens the Spleen, dries damp and transforms phlegm. Qing Pi is unripe tangerine peel or young fruit: soothes the Liver, breaks qi and reduces accumulation. Write Zhi Qiao or bran-fried Zhi Qiao. It is not kitchen orange peel. Use caution in pregnancy.
What are the TCM properties and traditional uses of Zhi Qiao?
According to the Chinese Pharmacopoeia, Zhi Qiao is bitter, acrid, sour and slightly cold, enters the Spleen and Stomach channels, and acts to regulate qi and expand the middle, move stagnation and disperse distention. It is used for chest-flank qi stagnation, distention and pain, undigested food accumulation, phlegm-rheum retention and visceral prolapse. Bitter-acrid and slightly cold, it suits qi stagnation with fullness—not Spleen-Stomach deficient cold without stagnation, or large doses in pregnancy.
How do you choose raw versus bran-fried Zhi Qiao? How does it differ from Zhi Shi?
Raw Zhi Qiao moves qi more distinctly; bran-fried Zhi Qiao is milder and often used for gastrointestinal qi stagnation. Zhi Shi breaks qi, reduces accumulation, transforms phlegm and dissipates focal distention more fiercely—focal fullness, tenesmus and bound chest; Zhi Qiao is gentler—chest-flank expansion and middle distention. Visceral prolapse needs qi-tonifying partners; do not break qi alone.
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Learn More About Zhi Ke

Explore our in-depth article covering the traditional uses, properties, functions, and TCM context of Zhi Ke.

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Medical Disclaimer — This article is provided for educational purposes only and describes traditional Chinese medicine concepts. It is not medical advice, and it is not intended to diagnose, treat, cure or prevent any disease. Always consult a qualified practitioner before using any herb, particularly if you are pregnant, nursing, taking medication or managing a diagnosed condition.

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