Chun Pi

What is Chun Pi?

Chun Pi comes from the inner bark of Ailanthus altissima, a fast-growing deciduous tree native to China. In Traditional Chinese Medicine it is classified as bitter and astringent in taste, cold in nature, and is assigned to the Large Intestine and Stomach meridians. It has been recorded in Chinese materia medica texts for over a thousand years as a remedy for heat-type diarrhea, bleeding disorders, and excessive vaginal discharge.

How does Chun Pi work?

The bark's bitter compounds — especially quassinoids like ailanthone — help reduce inflammation in the gut lining and may inhibit certain pathogens responsible for infectious diarrhea. Its astringent tannins help tone and tighten mucous membranes, which slows excessive discharge and reduces bleeding. Together these actions reflect what TCM describes as 'clearing heat and damp, and securing the lower jiao.'

What forms does Chun Pi come in?

Traditional use involves boiling the dried bark in water to make a decoction, usually 6–12 g per dose. Modern formulations include standardized granules and capsules for convenience. Topical washes made from the decoction are also used in TCM for skin infections and vaginal discharge. Quality and potency vary significantly between suppliers, so sourcing from reputable TCM pharmacies or standardized manufacturers is important.

Where it comes from:

Chun Pi appears in classical Chinese pharmacopeias including the Bencao Gangmu (Compendium of Materia Medica, 1578 CE) by Li Shizhen, where it is documented for treating chronic diarrhea, dysentery, and uterine bleeding. The tree itself was historically considered a symbol of resilience in Chinese culture. In modern Chinese clinical medicine, Chun Pi-based formulas continue to be prescribed for gastrointestinal and gynecological complaints, and interest has grown internationally due to the antimalarial and antiparasitic potential of its quassinoid compounds.

What does Chun Pi help with?

• Diarrhea and dysentery: Chun Pi's bitter compounds target gut pathogens while its astringent tannins help firm up loose stools and reduce fluid loss in the intestines. TCM uses it specifically for hot-type diarrhea with a burning sensation or urgency, where both antimicrobial and tightening effects are needed.
• Abnormal uterine bleeding: Classified as an astringent herb in TCM, Chun Pi is traditionally combined with other hemostatic herbs to reduce heavy or prolonged uterine bleeding. Its tannin content helps contract and tone uterine tissue, and it is considered especially useful when bleeding is accompanied by signs of internal heat.
• Leukorrhea (vaginal discharge): Chun Pi is a classic remedy for damp-heat patterns causing excessive, discolored, or malodorous vaginal discharge. It works both internally in decoctions and externally as a wash, with its antimicrobial and astringent actions helping reduce discharge and address underlying infection.
• Intestinal parasites: The quassinoid compounds in Chun Pi — particularly ailanthone — have demonstrated antiparasitic activity against intestinal worms and protozoa in laboratory settings. Traditional Chinese formulas include it for roundworm and other intestinal parasite infections, and modern research has renewed interest in its antiprotozoal potential.
• Inflammatory bowel symptoms: Its anti-inflammatory and antimicrobial properties help calm irritated bowel tissue, making it relevant for conditions with chronic gut inflammation, cramping, and mucus in stools. TCM practitioners use it in formulas aimed at clearing intestinal heat and resolving damp accumulation.
• Vaginal and skin infections: As a topical wash, Chun Pi decoctions have been used for centuries to treat localized bacterial and fungal infections of the skin and vaginal area. Laboratory studies support its antimicrobial activity against several common pathogens including Candida species and certain bacteria.
• Chronic loose stools: Unlike acute diarrhea treatments, Chun Pi's astringent quality makes it useful for long-standing loose stools without obvious infection — especially when paired with qi-tonifying herbs in TCM formulas. It helps restore normal stool consistency by toning the intestinal lining.
• Pelvic heat and inflammation (TCM): In TCM, conditions grouped under 'damp-heat in the lower jiao' — including pelvic inflammatory symptoms, burning urination, and thick discharge — are classic indications for Chun Pi. It is often combined with herbs like Huang Bai and Ku Shen in formulas targeting pelvic heat patterns.

What can Chun Pi help prevent?

• Recurrence of dysentery when used as a short-term preventive in endemic areas (traditional use, limited modern clinical data)

Which foods are rich in Chun Pi?

Chun Pi is an isolated herbal bark extract with no meaningful dietary food source. To support the same biological goals — reducing gut inflammation, improving intestinal tone, and addressing damp-heat patterns — focus on: 1) Fermented foods like plain yogurt, kefir, and miso to restore gut flora balance; 2) Bitter greens such as dandelion, arugula, and radicchio, which stimulate digestive secretions similarly to bitter herbs; 3) Garlic and ginger for their natural antimicrobial and anti-inflammatory effects in the gut; 4) Astringent fruits like pomegranate and unripe bananas, which contain tannins that help tone intestinal tissue; 5) Avoid sugar, alcohol, fried foods, and dairy excess, as these contribute to the 'damp-heat' pattern that Chun Pi is classically used to treat.

What are the side effects of Chun Pi?

• Nausea and stomach upset, especially on an empty stomach
• Vomiting at higher doses
• Diarrhea (paradoxically, if taken in excess)
• Liver enzyme elevation with excessive or prolonged use (case reports)
• Dizziness or headache in sensitive individuals
• Contraindicated during pregnancy: may stimulate uterine contractions
• Not recommended for people with Cold-deficiency digestive patterns in TCM (chronic weak digestion, pale stools)

Good to know:

Chun Pi is considered safe at traditional therapeutic doses under professional TCM guidance, but its bitter quassinoid compounds make it unsuitable for long-term use without supervision, and it should be avoided during pregnancy. Overdose or prolonged use can stress the liver and digestive system.

How much Chun Pi should you take?

• Recommended daily: 6–12 g of dried bark as a water decoction (TCM standard dose); standardized extract capsules vary by product — typically 300–500 mg standardized extract 2–3 times daily. Always follow TCM practitioner guidance.
• Best time of day: Traditionally taken in 2–3 divided doses throughout the day, not concentrated in a single large dose.
• With or without food: Best taken with food or shortly after meals to reduce nausea and protect the stomach lining from the bitter, cold nature of the herb.
• Time to effect: Acute conditions such as diarrhea or discharge may respond within 3–7 days; chronic conditions may take 2–4 weeks of consistent use.
• How long to take it: Use short-term (1–4 weeks) for acute conditions. For chronic conditions, follow a TCM practitioner's protocol and cycle with breaks. Not intended for indefinite daily use due to potential liver burden at sustained doses.