# Persicaria bistorta

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/persicaria-bistorta
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-04-02
**Evidence Score:** 2 / 10
**Category:** Other
**Also Known As:** Polygonum bistorta, Bistort, European bistort, Snake root, Snakeweed, Twice-writhed knotweed, Easter-ledges, Adderwort, Dragonwort, Sweet dock

## Overview

Persicaria bistorta is a medicinal herb containing tannins, flavonoids, and phenolic compounds—particularly oxymethylanthraquinones and ellagitannins—that exert anti-inflammatory effects by suppressing [pro-inflammatory cytokine](/ingredients/condition/inflammation) production. Preclinical research indicates these bioactives modulate NF-κB-mediated inflammatory signaling, making bistort a candidate for gut inflammation management.

## Health Benefits

• [Anti-inflammatory](/ingredients/condition/inflammation) effects in colitis models - Preliminary evidence from rat studies (PMID: 39044067) showing reduced inflammatory markers TNF-α, IL-1β, and IL-6
• Potential gut health support - Animal studies demonstrate significant reduction in colitis damage scores (from 4.66 to 1.33, p < 0.001) at highest tested dose
• Antibiofilm activity - In vitro studies show anti-quorum sensing effects against Pseudomonas aeruginosa (PMID: 32326481)
• [Antioxidant](/ingredients/condition/antioxidant) properties - Contains polyphenolic compounds that modulate redox signaling and NF-κB pathways (preliminary evidence)
• Traditional wound healing support - Historical use in Persian medicine for bleeding and tissue damage, though no clinical validation exists

## Mechanism of Action

Persicaria bistorta's primary bioactives—ellagitannins, gallic acid derivatives, and flavonoids such as quercetin—suppress the NF-κB signaling pathway, thereby reducing transcription of [pro-inflammatory cytokine](/ingredients/condition/inflammation)s TNF-α, IL-1β, and IL-6. Its tannin constituents also inhibit cyclooxygenase (COX) enzymes, limiting prostaglandin E2 synthesis at sites of mucosal inflammation. Additionally, polyphenolic compounds may scavenge [reactive oxygen species](/ingredients/condition/antioxidant) (ROS) and modulate toll-like receptor 4 (TLR4) activation, further dampening the innate immune inflammatory cascade.

## Clinical Summary

Current evidence for Persicaria bistorta is limited to preclinical animal models; no published human clinical trials exist as of 2024. A rat study (PMID: 39044067) demonstrated statistically significant reductions in histological colitis damage scores from 4.66 to 1.33 (p < 0.001) following bistort extract administration. The same study measured meaningful suppression of serum TNF-α, IL-1β, and IL-6 concentrations in treated animals versus controls. While these results are mechanistically plausible, extrapolation to human efficacy requires controlled clinical trials, and the evidence should be characterized as preliminary.

## Nutritional Profile

Persicaria bistorta (bistort/serpent root) contains limited formally quantified nutritional data, but the following bioactive constituents have been identified: Polyphenols and tannins are the dominant bioactive class, with hydrolysable tannins (including ellagitannins) and condensed tannins (proanthocyanidins) reported as primary constituents - tannin content in rhizomes historically noted as high (estimated 15-20% dry weight in root material, though precise modern quantification is limited). Flavonoids including quercetin, kaempferol, and their glycosides have been detected. Oxalic acid is present in leaf tissue (consistent with Polygonaceae family traits), which reduces mineral bioavailability when consumed as food. Starch content in the rhizome is notable - historically used as a famine food and flour source, suggesting significant carbohydrate content. Phenolic acids including gallic acid and ellagic acid contribute to the observed [anti-inflammatory](/ingredients/condition/inflammation) and antibiofilm activity referenced in PMID 39044067. Vitamin C has been reported in aerial parts at moderate concentrations consistent with leafy Polygonaceae. Minerals including potassium, calcium, and iron are present but bioavailability is reduced by oxalate and tannin binding. The rhizome contains astringent compounds (tannins) that likely mediate the colitis-protective effects observed in animal models. Fiber content in aerial parts is moderate; rhizome starch is the primary energy-yielding macronutrient. Protein content is low. Overall, this plant is better characterized as a source of bioactive polyphenols than as a significant macronutrient contributor.

## Dosage & Preparation

Animal studies used freeze-dried aqueous extract at 300-700 mg/kg body weight (oral administration in rats). The studied extract contained 4.973 ± 1.102 mg/g gallic acid content. No human dosage recommendations exist in the scientific literature. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Persicaria bistorta has a long history of traditional use in European herbal medicine, suggesting reasonable tolerability at culinary and low supplemental doses, but formal human safety trials are absent. Its high tannin content may cause gastrointestinal discomfort, nausea, or constipation at elevated doses, and may reduce the absorption of iron, zinc, and certain medications including antibiotics and alkaloid-based drugs. Due to insufficient safety data, use during pregnancy and lactation should be avoided. Individuals taking anticoagulants should exercise caution, as tannic acid constituents may theoretically interact with warfarin [metabolism](/ingredients/condition/weight-management).

## Scientific Research

Current evidence is limited to preclinical animal studies with no human clinical trials published. The most relevant study (PMID: 39044067) evaluated freeze-dried aqueous extract in rats with acetic acid-induced colitis, showing dose-dependent [anti-inflammatory](/ingredients/condition/inflammation) effects at 300-700 mg/kg. No randomized controlled trials, clinical studies, or meta-analyses in humans have been conducted.

## Historical & Cultural Context

Persicaria bistorta is repeatedly mentioned in traditional Persian medicine for the treatment of bleeding and tissue damage in different organs, including the intestines. The plant has also been used in traditional European herbalism, though specific historical applications and timeframes are not detailed in available sources.

## Synergistic Combinations

Turmeric, Boswellia serrata, Quercetin, Omega-3 fatty acids, [Probiotic](/ingredients/condition/gut-health)s

## Frequently Asked Questions

### What is Persicaria bistorta used for?

Persicaria bistorta is primarily studied for its anti-inflammatory properties, particularly in the context of gut inflammation. Preclinical rat models show it reduces colitis damage scores from 4.66 to 1.33 and lowers pro-inflammatory markers TNF-α, IL-1β, and IL-6, though human evidence is not yet available.

### What are the active compounds in Persicaria bistorta?

The key bioactive constituents of Persicaria bistorta include ellagitannins, gallic acid, quercetin, and other condensed and hydrolyzable tannins, along with oxymethylanthraquinones. These compounds collectively contribute to its antioxidant and anti-inflammatory pharmacological profile by inhibiting NF-κB signaling and COX enzyme activity.

### Is there human clinical trial data for Persicaria bistorta?

As of 2024, no published human clinical trials exist for Persicaria bistorta as a supplement or therapeutic agent. All quantified efficacy data comes from animal models, specifically rat colitis studies such as PMID: 39044067. Robust human evidence is needed before clinical recommendations can be made.

### Does Persicaria bistorta interact with any medications?

Persicaria bistorta's high tannin content can bind to and reduce the absorption of iron supplements, zinc, tetracycline antibiotics, and alkaloid-based pharmaceuticals if taken simultaneously. There is also a theoretical interaction risk with anticoagulants like warfarin due to polyphenol interference with cytochrome P450 metabolism. Separating bistort intake from medications by at least two hours is generally advisable as a precaution.

### Is Persicaria bistorta safe during pregnancy?

Persicaria bistorta lacks formal safety studies in pregnant or breastfeeding women, making its use during these periods inadvisable under current evidence standards. Traditional herbal texts and WHO monograph frameworks generally counsel avoidance of tannin-rich botanicals in pregnancy due to potential effects on iron absorption and insufficient embryotoxicity data. Consult a qualified healthcare provider before use.

### What does the research show about Persicaria bistorta's effectiveness for inflammatory bowel conditions?

Animal studies have demonstrated promising anti-inflammatory effects, with rat colitis models showing significant reductions in inflammatory markers including TNF-α, IL-1β, and IL-6. In these studies, the highest tested dose reduced colitis damage scores from 4.66 to 1.33 (p < 0.001), suggesting potential gut-protective mechanisms. However, human clinical trial data is currently limited, and further research is needed to establish efficacy and optimal dosing in human populations.

### Who would benefit most from Persicaria bistorta supplementation based on current evidence?

Based on preliminary animal research, individuals interested in gut health support and inflammatory response management may be potential candidates, particularly those concerned with colitis or intestinal inflammation. The ingredient's demonstrated antibiofilm and anti-quorum sensing properties suggest it may benefit those seeking to support a healthy microbiome. However, without human clinical trials, personalized medical advice from a healthcare provider is essential before supplementation.

### How does Persicaria bistorta compare to other traditional botanical remedies for gut inflammation?

Persicaria bistorta is recognized in WHO/EMA monographs as a traditional plant remedy with specific anti-inflammatory mechanisms demonstrated in preliminary research. While many botanicals support digestive health, Persicaria bistorta's unique antibiofilm activity and targeted effects on TNF-α, IL-1β, and IL-6 markers distinguish it from more commonly used alternatives like slippery elm or marshmallow root. Direct comparative clinical studies between Persicaria bistorta and other gut-supporting botanicals are currently lacking.

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*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
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