# Buplerum (Bupleurum chinense)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/buplerum
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-29
**Evidence Score:** 2 / 10
**Category:** Traditional Chinese Medicine
**Also Known As:** Chai Hu, Radix Bupleuri, Chinese Thoroughwax, Hare's Ear Root, Bei Chai Hu, Saiko, Thorowax Root, Bupleurum Root

## Overview

Bupleurum (Bupleurum chinense) is a traditional Chinese medicinal herb whose primary bioactive compounds, saikosaponins (particularly saikosaponin-a and saikosaponin-d), drive its [hepatoprotective](/ingredients/condition/detox) and [anti-inflammatory](/ingredients/condition/inflammation) effects. These triterpenoid saponins modulate glucocorticoid receptor activity and suppress NF-κB signaling, reducing inflammatory cytokine production and oxidative liver damage.

## Health Benefits

• May reduce liver cancer risk when used in formulas like sho-saiko-to, though effects are not solely attributable to bupleurum [Preliminary evidence]. • Exhibits [hepatoprotective](/ingredients/condition/detox) effects in animal models, such as reduced ALT/AST levels in CCl4-induced liver injury [Preclinical study]. • Demonstrates [anti-inflammatory](/ingredients/condition/inflammation) properties through cytokine modulation [Preclinical study]. • Inhibits certain liver cancer cell growth in vitro [In-vitro study]. • Traditional use suggests benefits for liver disorders and [immune modulation](/ingredients/condition/immune-support) [Historical use].

## Mechanism of Action

Saikosaponin-a and saikosaponin-d, the principal triterpenoid glycosides in Bupleurum chinense, bind glucocorticoid receptors to potentiate endogenous [cortisol](/ingredients/condition/stress)-like anti-inflammatory activity without directly acting as steroids. These compounds also inhibit NF-κB and MAPK signaling pathways, suppressing downstream production of [pro-inflammatory cytokine](/ingredients/condition/inflammation)s including TNF-α, IL-6, and IL-1β. Additionally, saikosaponins upregulate Nrf2-mediated antioxidant enzymes such as superoxide dismutase and [glutathione](/ingredients/condition/detox) peroxidase, protecting hepatocytes from [oxidative stress](/ingredients/condition/antioxidant)-induced apoptosis.

## Clinical Summary

Most human evidence for bupleurum comes from multi-herb Japanese Kampo formula sho-saiko-to (TJ-9), in which bupleurum is a principal ingredient; a randomized controlled trial in 260 cirrhotic patients found reduced hepatocellular carcinoma incidence over 5 years, though the effect cannot be isolated to bupleurum alone. Animal studies using CCl4-induced liver injury models consistently show significant reductions in serum ALT and AST levels with bupleurum extracts standardized to saikosaponins, indicating [hepatoprotective](/ingredients/condition/detox) activity at the preclinical level. Small pilot studies in humans with chronic hepatitis B suggest improvement in liver enzyme profiles, but sample sizes rarely exceed 50 participants and methodological quality is generally low. Overall, the evidence is preliminary to moderate for hepatoprotection; robust, large-scale placebo-controlled trials isolating bupleurum are lacking.

## Nutritional Profile

Bupleurum chinense root (the primary medicinal part) contains minimal conventional macronutrients as it is used in small therapeutic doses (3–12g dried root per day in TCM practice), not as a food source. Key bioactive compounds include: Saikosaponins (triterpene saponins) — primarily saikosaponin-a, saikosaponin-b1, saikosaponin-b2, saikosaponin-c, and saikosaponin-d, collectively comprising approximately 0.3–2.2% of dry root weight, with saikosaponin-a and saikosaponin-d considered the most pharmacologically active; Polysaccharides (bupleuran 2IIb and related fractions) — approximately 3–8% of dry weight, contributing to [immunomodulatory](/ingredients/condition/immune-support) effects; Flavonoids — including rutin, isorhamnetin, and quercetin derivatives, present at trace concentrations (<0.1% dry weight); Volatile essential oils — approximately 0.1–0.5% dry weight, containing compounds such as 2-methyl cyclopentanone and bornyl acetate; Lignans — including bupleurumlignans at trace levels; Sterols — including alpha-spinasterol and stigmasterol at minor concentrations. Minerals present in dried root include small amounts of potassium, calcium, and magnesium, though concentrations are not standardized in the literature and are clinically insignificant at therapeutic doses. Crude fiber content is approximately 20–30% of dry weight typical of woody roots. Protein content is low, approximately 5–8% dry weight. Bioavailability note: Saikosaponins undergo significant hydrolysis in the gastrointestinal tract to their prosapogenin forms (e.g., saikosaponin-b2 from saikosaponin-a), which may be the primary absorbed species; water decoction (as used in TCM) extracts saikosaponins and polysaccharides effectively, while ethanolic extraction yields higher saikosaponin concentrations. First-pass hepatic [metabolism](/ingredients/condition/weight-management) significantly affects systemic bioavailability of saikosaponins.

## Dosage & Preparation

Clinically studied dosages are from sho-saiko-to formulas containing Bupleurum chinense at 2.5 grams of the formula three times daily, providing approximately 400 mg of bupleurum per dose. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Bupleurum is generally well tolerated at typical doses of 3–12 g dried root per day in TCM decoctions or 300–600 mg standardized extract, but high doses may cause nausea, vomiting, and sedation. Saikosaponins have demonstrated immunostimulatory properties in vitro, raising a theoretical concern for exacerbation of autoimmune conditions such as lupus or rheumatoid arthritis, though clinical documentation is limited. Bupleurum may potentiate the sedative effects of CNS depressants and interact with immunosuppressants like cyclosporine due to CYP3A4 modulation by saikosaponins. It is contraindicated during pregnancy due to potential uterine-stimulating effects observed in animal models, and safety during breastfeeding has not been established.

## Scientific Research

Clinical evidence for Bupleurum chinense is primarily derived from its inclusion in multi-herb formulas like sho-saiko-to, with no standalone randomized controlled trials identified. The available studies are preliminary and focus on animal models or mixed formulations.

## Historical & Cultural Context

Bupleurum chinense has been used in Traditional Chinese Medicine for over 2,000 years, primarily to treat fevers, liver disorders, and digestive issues. It is also a key component in Japanese Kampo medicine for liver conditions.

## Synergistic Combinations

Ginseng, Scullcap, Licorice, Ginger, Dandelion

## Frequently Asked Questions

### What are saikosaponins and why do they matter in bupleurum?

Saikosaponins are triterpenoid glycosides — primarily saikosaponin-a, -b, -c, and -d — found in Bupleurum chinense root and considered the primary active constituents. Saikosaponin-a and -d are most studied for their hepatoprotective, anti-inflammatory, and immunomodulatory actions, including NF-κB inhibition and glucocorticoid receptor activation. Standardized bupleurum extracts are typically normalized to a minimum of 1–3% total saikosaponins to ensure consistent potency.

### Can bupleurum protect the liver?

Preclinical evidence is strong: in CCl4-induced hepatotoxicity rat models, bupleurum extracts significantly reduced serum ALT and AST levels and decreased hepatic lipid peroxidation markers like MDA while increasing glutathione. Human evidence is largely indirect, coming from sho-saiko-to formula studies rather than isolated bupleurum trials. Until dedicated randomized controlled trials are conducted in humans, liver-protective claims for bupleurum alone should be considered supported by animal data only.

### What is the recommended dosage of bupleurum?

Traditional Chinese Medicine practitioners typically prescribe 3–12 g of dried Bupleurum chinense root per day as a decoction, usually as part of a multi-herb formula. For standardized supplements, doses of 300–600 mg per day of an extract standardized to 2–3% saikosaponins are commonly used in modern practice. No definitive human clinical dose-response studies have established an optimal dosage, so following product labeling or consulting a qualified TCM practitioner is advised.

### Does bupleurum interact with any medications?

Saikosaponins in bupleurum have been shown to modulate cytochrome P450 enzymes, particularly CYP3A4, which could alter plasma levels of drugs metabolized by this pathway including cyclosporine, statins, and certain antifungals. Bupleurum may also amplify the sedative effects of benzodiazepines, opioids, and other CNS depressants due to additive effects on the central nervous system. Patients on anticoagulants, immunosuppressants, or hepatotoxic medications should consult a physician before use.

### Is bupleurum safe during pregnancy?

Bupleurum is generally considered contraindicated during pregnancy based on animal studies showing that saikosaponins, particularly saikosaponin-d, may stimulate uterine contractions and pose a risk of miscarriage or premature labor. No controlled human studies have assessed its safety in pregnant women, and most authoritative TCM references classify it as an herb to avoid during gestation. Breastfeeding mothers should also avoid bupleurum due to insufficient safety data on neonatal exposure through breast milk.

### What forms of bupleurum are most effective—dried root, extract, or standardized preparations?

Standardized extracts containing quantified saikosaponins (typically 10–40%) demonstrate more consistent bioavailability and therapeutic effects compared to crude dried root, making them preferred for clinical applications. Traditional decoctions of dried root remain effective but have variable saikosaponin content depending on harvest time and plant source. Liquid extracts fall between these options, offering better absorption than whole plant material while maintaining more traditional preparation methods.

### Who benefits most from bupleurum supplementation, and who should avoid it?

Individuals with chronic inflammatory conditions, compromised liver function, or those using traditional Chinese medicine formulas may benefit most from bupleurum, particularly in combination products like sho-saiko-to. However, those with liver disease requiring specific medical management, individuals taking immunosuppressants, and people with a history of adverse reactions to Bupleurum species should avoid supplementation without professional guidance. Pregnant women and nursing mothers should avoid bupleurum due to insufficient safety data.

### How strong is the clinical evidence for bupleurum's effectiveness compared to preclinical findings?

While preclinical studies show strong hepatoprotective effects (reduced liver enzyme markers and anti-inflammatory activity), clinical evidence is primarily limited to combination formulas like sho-saiko-to rather than bupleurum monotherapy, making it difficult to isolate its standalone efficacy. Most human research demonstrates preliminary or moderate evidence, particularly for liver cancer risk reduction, whereas animal models show more robust dose-dependent effects. Higher-quality randomized controlled trials specifically examining bupleurum alone are needed to establish definitive clinical benefit.

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