Zhī Zǐ (栀子) — Gardenia Fruit

On this page

1. Overview
2. Properties
3. Actions and indications
4. Key formulas
5. Modern research
6. Cautions and contraindications
7. Treatment at my clinic

1. Overview

Zhī Zǐ (栀子) is the ripe dried fruit of Gardenia jasminoides, known in English as Gardenia fruit or Cape jasmine fruit. It belongs to the category of Herbs that drain Fire in the Chinese Materia Medica and is one of the most useful herbs in Chinese herbal medicine for clearing heat from the three Burners, eliminating constraint heat with irritability, and treating Damp-Heat in the Liver and Gallbladder.

I prescribe Zhī Zǐ as part of bespoke herbal formulas from pharmaceutical-grade granules sourced from Sun Ten in Taiwan. Herbs are always combined with other herbs selected to match the patient’s individual TCM pattern. Online consultations are available for patients who cannot attend my clinic in person.

2. Properties

3. Actions and indications

Principal actions

1. Drains Heat and eases constraint with irritability and restlessness
2. Drains Damp-Heat through urination, particularly from the Liver and Gallbladder
3. Cools the Blood and stops bleeding from Heat
4. Reduces swelling and resolves heat-toxin in the skin

Indications

1. Heat-pattern insomnia, restlessness and irritability with a sensation of fullness in the chest
2. Damp-Heat jaundice with dark urine and a yellow tongue coat
3. Damp-Heat urinary disorders with burning, urgency and concentrated urine
4. Bleeding from Heat in the Blood — epistaxis, haematemesis, blood in the stool or urine
5. Hot, red, painful skin lesions and traumatic injuries (topically)

4. Key formulas containing Zhī Zǐ

Zhī Zǐ appears in Zhi Zi Chi Tang (Gardenia and Prepared Soybean Decoction) for residual heat in the chest after febrile illness, Jia Wei Xiao Yao San for Liver Qi stagnation with Heat, Long Dan Xie Gan Tang for Liver and Gallbladder Damp-Heat, and many other Heat-clearing formulas.

5. Modern research

Gardenia fruit contains iridoid glycosides (notably geniposide and gardenoside), crocins (responsible for the yellow colour, related to those in saffron), and a range of monoterpenes. Pharmacological studies report hepatoprotective, choleretic, anti-inflammatory, antipyretic, anxiolytic and sedative effects. Crocin has been investigated for neuroprotective and antidepressant activity, broadly consistent with the herb’s traditional use for irritability and constraint heat.

6. Cautions and contraindications

Use with caution in patients with cold-deficient diarrhoea or weak Spleen Qi, as the cold bitter nature can damage Spleen Yang. Avoid long-term high-dose use without supporting herbs.

Important: Chinese herbs should always be prescribed by a fully qualified herbalist who is a member of the Register of Chinese Herbal Medicine (RCHM). Never self-prescribe or self-administer Chinese herbs without professional guidance. Dr (TCM) Attilio D’Alberto is a member of the RCHM and the British Acupuncture Council with over 25 years of clinical experience.

7. Treatment at my clinic

I prescribe Zhī Zǐ as part of tailored herbal formulas for anxiety with marked irritability, Heat-pattern insomnia, urinary tract infections with damp-heat signs, and bleeding from Heat in the Blood. Every prescription is individually formulated following a full TCM assessment.

I see patients in person at my clinic in Wokingham, Berkshire. Online Chinese herbal medicine consultations are available for patients throughout the UK and internationally, with herbs dispensed by post. Visit the prices page for consultation fees.

Return to the Chinese herb directory or the Chinese herbal medicine main page.

Prefer to be treated from home? Chinese herbal medicine online consultations are available throughout the UK and worldwide. After a full video consultation, Dr (TCM) Attilio D'Alberto formulates a bespoke herbal prescription and posts your Chinese herbs directly to your door.