# Tormentil (Potentilla erecta)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/tormentil
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-31
**Evidence Score:** 2 / 10
**Category:** European
**Also Known As:** Potentilla erecta, Bloodroot, Septfoil, Thormantle, Red root, English sarsaparilla, Ewe daisy, Shepherd's knapperty, Upright cinquefoil, Common tormentil

## Overview

Tormentil (Potentilla erecta) contains tannins and ellagitannins that provide astringent and [anti-inflammatory](/ingredients/condition/inflammation) properties. The herb primarily works through tannin-induced protein precipitation and inhibition of inflammatory mediators.

## Health Benefits

• May reduce stool frequency in ulcerative colitis based on early-phase studies, though evidence lacks rigorous controls.
• Potentially enhances standard tuberculosis treatment, but its isolated role needs further research.
• Demonstrated [anti-inflammatory](/ingredients/condition/inflammation) effects in a murine model of Campylobacter jejuni, reducing [T-cell](/ingredients/condition/immune-support) numbers and cytokines.
• Traditional use for diarrhea and mucosal inflammation, supported by astringent properties.
• [Antioxidant](/ingredients/condition/antioxidant) properties due to high tannin content, with mild antibacterial effects noted in preclinical models.

## Mechanism of Action

Tormentil's tannins bind to proteins and mucous membranes, creating an astringent effect that reduces inflammation and secretions. The ellagitannins inhibit [pro-inflammatory cytokine](/ingredients/condition/inflammation)s and may modulate immune responses. These compounds also demonstrate [antimicrobial](/ingredients/condition/immune-support) activity by disrupting bacterial cell membranes.

## Clinical Summary

Early-phase studies suggest tormentil may reduce stool frequency in ulcerative colitis patients, though these lack rigorous placebo controls. One study indicated potential benefits as adjunctive therapy for tuberculosis treatment, but the isolated contribution of tormentil remains unclear. Animal studies demonstrate [anti-inflammatory](/ingredients/condition/inflammation) effects in Campylobacter-induced inflammation models. Overall clinical evidence is limited and requires larger, controlled trials.

## Nutritional Profile

Tormentil (Potentilla erecta) is a medicinal herb primarily valued for its bioactive phytochemicals rather than conventional macronutrient content. The rhizome is the primary medicinal part used. Key bioactive compounds include: Tannins (15–22% dry weight of rhizome), predominantly ellagitannins such as agrimoniin, pedunculagin, and potentillin, with condensed catechol-type tannins also present; these are the principal active constituents. Tormentoside (a triterpene glycoside) is present in modest but pharmacologically relevant concentrations (~0.5–1% dry weight). Catechins and procyanidins (oligomeric proanthocyanidins) contribute to the overall polyphenol load, estimated at 2–5% dry weight. Ellagic acid is present as a hydrolysis product of ellagitannins. Tormentillin and a related phlobaphene-type red pigment (tormentil-red) are identifiable in the rhizome. Flavonoids including kaempferol and quercetin glycosides are present in smaller quantities (<1% dry weight). Triterpenes including tormentic acid and ursolic acid are detectable at trace-to-low levels. Fiber content is moderate given its woody rhizome structure; precise macronutrient data (protein, fat, carbohydrate) are not systematically documented as it is not a food source. Minerals including iron, calcium, and manganese have been detected in rhizome extracts but at nutritionally insignificant levels for typical medicinal doses. Bioavailability notes: Ellagitannins are hydrolyzed in the gut to ellagic acid, which is further metabolized by intestinal microbiota to urolithins (urolithin A and B), which may contribute to [anti-inflammatory](/ingredients/condition/inflammation) effects; individual [microbiome](/ingredients/condition/gut-health) composition significantly affects this conversion. High tannin content may reduce protein and mineral absorption if consumed in large quantities, limiting its use as a nutritional supplement.

## Dosage & Preparation

Traditional dosages include 1-2 g of dried root per cup in herbal tea, taken 2-3 times daily, or 1-3 mL of tincture 3 times daily. In mice, an aqueous extract of 12 mg/kg body weight daily showed effects. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Tormentil is generally well-tolerated when used short-term, though high tannin content may cause stomach upset in sensitive individuals. The herb's astringent properties could potentially reduce absorption of oral medications when taken simultaneously. No significant drug interactions are documented, but caution is advised with iron supplements due to tannin interference. Safety during pregnancy and lactation has not been established.

## Scientific Research

Human clinical evidence for tormentil is limited, with no large-scale RCTs or meta-analyses available. One early study noted symptom improvement in ulcerative colitis patients using tormentil extract, though it lacked rigorous controls (PMID not provided). Preclinical studies in murine models suggest potential [anti-inflammatory](/ingredients/condition/inflammation) effects.

## Historical & Cultural Context

Tormentil has been used in European herbal medicine since at least the 17th century, traditionally for treating diarrhea, dysentery, and colitis, and externally for wounds. It is documented in texts like 'A Modern Herbal' for various ailments including stomach and spleen issues.

## Synergistic Combinations

Chamomile, Peppermint, Ginger, Marshmallow root, Slippery elm

## Frequently Asked Questions

### What is the active ingredient in tormentil?

Tormentil contains 15-20% tannins, primarily ellagitannins and condensed tannins. These compounds provide the herb's characteristic astringent and anti-inflammatory properties.

### How much tormentil should I take daily?

Traditional dosing ranges from 4-6 grams of dried root daily, or 1-3 ml of liquid extract three times daily. Clinical studies have not established optimal dosing protocols.

### Can tormentil help with diarrhea?

Tormentil's astringent tannins may help reduce loose stools by binding to intestinal proteins and reducing inflammation. However, clinical evidence for diarrhea treatment remains limited.

### Is tormentil safe to take with medications?

Tormentil may reduce absorption of oral medications due to its high tannin content. Take medications at least 2 hours apart from tormentil to avoid potential interactions.

### What are the side effects of tormentil?

Common side effects include mild stomach upset, nausea, or constipation due to the high tannin content. These effects are typically dose-dependent and resolve with discontinuation.

### What does research show about tormentil's effectiveness for inflammatory bowel conditions?

Early-phase studies suggest tormentil may reduce stool frequency in ulcerative colitis, though these findings lack rigorous controls and larger clinical trials are needed to confirm efficacy. Animal studies have demonstrated anti-inflammatory effects in models of bacterial gastroenteritis (Campylobacter jejuni), with reductions in T-cell numbers and inflammatory cytokines. However, evidence for human IBD treatment remains preliminary, and tormentil should not replace standard medical management without consulting a healthcare provider.

### Who should avoid tormentil or use it with caution?

Pregnant and nursing women should avoid tormentil due to limited safety data in these populations. Individuals with severe gastrointestinal conditions should consult their doctor before use, as high-tannin content may cause constipation or worsen certain digestive issues. People taking tuberculosis medications or other medications requiring consistent absorption should discuss tormentil use with a healthcare provider, as it may interfere with drug bioavailability.

### How does the tannin content in tormentil affect its absorption and effectiveness?

Tormentil's potency is primarily attributed to its high concentration of ellagitannins and catechin tannins, which provide its astringent and anti-inflammatory properties. These tannins can bind to proteins and reduce nutrient absorption in the digestive tract, which is why taking tormentil with food or separating it from other supplements may be advisable. The same tannins that make tormentil effective for diarrhea may also contribute to constipation if used excessively or in sensitive individuals.

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