Bǔ Gǔ Zhī (补骨脂) — Psoralea Fruit

On this page

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

1. Overview

Bǔ Gǔ Zhī (补骨脂) is the ripe dried fruit of Cullen corylifolium (formerly Psoralea corylifolia), known in English as psoralea fruit or babchi. It belongs to the category of Herbs that tonify Yang in the Chinese Materia Medica and is one of the most important Kidney-Yang-tonifying herbs in Chinese herbal medicine, used for impotence, frequent urination, dawn (cock-crow) diarrhoea and chronic wheezing of Kidney deficiency origin. The seed also contains psoralens, which are used topically in conventional dermatology under controlled medical supervision.

I prescribe Bǔ Gǔ Zhī as part of bespoke herbal formulas from pharmaceutical-grade granules sourced from Sun Ten in Taiwan.

2. Properties

3. Actions and indications

Principal actions

1. Tonifies Kidney Yang and consolidates essence
2. Warms the Spleen and stops chronic diarrhoea
3. Aids Kidney Qi in grasping Lung Qi to ease chronic wheezing

Indications

1. Impotence, premature ejaculation, spermatorrhoea from Kidney Yang deficiency
2. Frequent urination, nocturia and urinary incontinence from Kidney Qi deficiency
3. Dawn diarrhoea (Wǔ Gēng Xiè) from Kidney-Spleen Yang deficiency
4. Chronic wheezing of Kidney deficiency origin (Kidney failing to grasp Lung Qi)
5. Topical/historical use in vitiligo treatment (formal medical psoralen-PUVA therapy is a regulated dermatology procedure, distinct from herbal use)

4. Modern research

Cullen corylifolium contains psoralen, isopsoralen, bakuchiol, bavachalcone and flavonoids. Pharmacological studies report oestrogenic activity, osteogenic effects (stimulating bone formation), antimicrobial and anti-inflammatory action, alongside the well-known photosensitising activity of psoralens. Bakuchiol has attracted attention in cosmetic dermatology as a gentler retinol-like compound. The herb’s photosensitising activity means oral and topical use both require care with sun exposure.

5. Cautions and contraindications

Hepatotoxicity risk: case reports have linked Bǔ Gǔ Zhī (particularly in high doses, long-term use, or as a sole agent in self-administered supplements) to drug-induced liver injury. The herb should be used at standard TCM doses, within properly composed formulas, for limited periods, with consideration of baseline liver function. Photosensitivity: psoralens can cause exaggerated reactions to UV light; counsel patients on sun protection during use. Avoid in pregnancy. Contraindicated in Yin deficiency with Heat signs, and in patients with known liver disease.

Important: Chinese herbs should always be prescribed by a fully qualified herbalist who is a member of the Register of Chinese Herbal Medicine (RCHM). Self-administration of Bǔ Gǔ Zhī — especially as a single supplement — is not advised. Dr (TCM) Attilio D’Alberto is a member of the RCHM with over 25 years of clinical experience.

6. Treatment at my clinic

Where clinically indicated, I prescribe Bǔ Gǔ Zhī as part of carefully balanced herbal formulas for Kidney-Yang-deficiency presentations — impotence, dawn diarrhoea, frequent nocturia, and chronic wheezing from Kidney failing to grasp Lung Qi. Use is short-term, within a properly designed formula, with regular review. 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.

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