Chinese Honeylocust Fruit
- Chinese
- 皂角
- Pinyin
- Zao Jia
- Latin
- Fructus Gleditsiae Abnormalis
Known in TCM as Zao Jia (皂角), this pungent and salty, warm herb enters the Lung and Large Intestine. Traditionally, it expels stubborn phlegm and opens the orifices - Zao Jia is used for thick phlegm obstruction, wheezing, phlegm syncope, and blocked sensory opening states, most often applied for productive cough, wheezing, and sore throat. Modern research has identified Triterpenoid among its active constituents.
Part used: Fruit Also known as: Gleditsia
TCM Properties
- Taste
- pungent, salty
- Temperature
- warm
- Channels
- Lung, Large Intestine
Traditional Use
Primary Actions
- Expels stubborn phlegm and opens the orifices - Zao Jia is used for thick phlegm obstruction, wheezing, phlegm syncope, and blocked sensory opening states.
- Reduces swelling and dissipates masses - traditional indications include throat swelling, sores, and abscesses before ulceration.
- Kills parasites and is used externally - tinea and other stubborn skin conditions are part of its classical profile.
Secondary Actions
- Zao Jia is strongly dispersing and slightly toxic, so classical internal dosing is very small and often delivered as powder rather than ordinary decoction amounts.
- This fruit record is distinct from Zao Jiao Ci, the spine, which is more focused on pushing pus and reducing swelling.
Classic Formulas
- Orifice-opening powder lineages use very small amounts of Zao Jia for phlegm syncope and stubborn internal blockage.
- Sore-swelling and throat-obstruction lineages combine Zao Jia with heat-clearing and toxin-resolving herbs when phlegm and toxin bind together.
Classical References
- TCM Wiki describes Zao Jia as pungent, salty, warm, and slightly toxic, entering the Lung and Large Intestine to dispel phlegm, open blockage, expel wind, and kill worms.
- Traditional cautions emphasize that Zao Jia is too harsh for pregnancy, bleeding tendency, and severe qi-yin deficiency.
Modern Research
Active Compounds
- Triterpenoid saponins - the most discussed bioactive fraction in Gleditsia fruit research
- Flavonoids and sterols - supportive phytochemical fractions in genus-level review literature
- Polysaccharides - broader plant constituents under ongoing investigation
- Irritant pungent principles - relevant to its strong dispersing and emetic traditional reputation
Studied Effects
- A 2016 review of Gleditsia species summarized ethnomedical, phytochemical, and pharmacological data across the genus, including fruit use in Chinese medicine (PMID 26643065).
- Gleditsia sinensis fruit extract showed antiproliferative activity in human solid tumor cell lines in preclinical work (PMID 12673105).
- Another study reported anti-leukemia activity for a saponin-rich Gleditsia sinensis fruit extract, again in an experimental oncology context rather than in clinical TCM treatment (PMID 12883747).
PubMed References
- Gleditsia species: An ethnomedical, phytochemical and pharmacological review. (2016)
- Antiproliferative activity of the extract of Gleditsia sinensis fruit on human solid tumour cell lines. (2002)
- Gleditsia sinensis fruit extract is a potential chemotherapeutic agent in chronic and acute myelogenous leukemia. (2003)
Safety & Interactions
Contraindications
- Pregnancy
- Qi and yin deficiency
- Bleeding tendency or active hemorrhage
Cautions
- Zao Jia is slightly toxic and can provoke vomiting, diarrhea, and strong irritation if overdosed.
- Only very small processed internal doses are used traditionally; this is not a self-care herb.
- Because it opens forcefully and irritates strongly, it should be avoided in frail patients unless expertly prescribed.
Conditions
- Productive Cough Traditional ★★★★☆ JSON
- Wheezing Traditional ★★★☆☆ JSON
- Sore Throat Traditional ★★★☆☆ JSON
- Tinea Traditional ★★☆☆☆ JSON