# Great Mullein (Verbascum thapsus)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/great-mullein
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-04-01
**Evidence Score:** 2 / 10
**Category:** European
**Also Known As:** Verbascum thapsus, Common Mullein, Woolly Mullein, Aaron's Rod, Candlewick Plant, Flannel Leaf, Velvet Plant, Torch Weed, Cowboy Toilet Paper, Lady's Foxglove, Blanket Leaf, Beggar's Stalk

## Overview

Great mullein (Verbascum thapsus) contains saponins and mucilage that provide respiratory support through [anti-inflammatory](/ingredients/condition/inflammation) and expectorant mechanisms. Research demonstrates [antiviral](/ingredients/condition/immune-support) activity against influenza A and herpes simplex virus in laboratory studies.

## Health Benefits

• [Antiviral](/ingredients/condition/immune-support) effects against influenza A and herpes, shown in vitro and animal models (2023 study). • Potential antibacterial activity against pneumonia, staph, and E. coli, though study details are sparse. • Traditionally used to alleviate pulmonary issues, such as coughs and bronchitis. • [Anti-inflammatory](/ingredients/condition/inflammation) properties attributed to compounds like saponins and flavonoids. • May act as an expectorant, thinning mucus and easing respiratory congestion.

## Mechanism of Action

Mullein's saponins, particularly verbascosaponin, exhibit [antiviral](/ingredients/condition/immune-support) activity by inhibiting viral replication and reducing viral load in infected cells. The mucilage content provides demulcent effects that soothe inflamed respiratory tissues, while verbascoside demonstrates [anti-inflammatory](/ingredients/condition/inflammation) activity through cyclooxygenase inhibition.

## Clinical Summary

A 2023 in vitro study demonstrated significant [antiviral](/ingredients/condition/immune-support) effects against influenza A and herpes simplex virus, with viral load reductions of up to 90% in cell cultures. Animal models have shown respiratory benefits, though specific dosages and study populations vary. Limited human clinical trials exist, with most evidence based on traditional use and preliminary laboratory research. Current evidence is promising but requires larger randomized controlled trials to establish therapeutic efficacy.

## Nutritional Profile

Great Mullein (Verbascum thapsus) is a medicinal herb rather than a dietary staple, so macronutrient content is minimal and not nutritionally significant in typical usage. Bioactive compounds are the primary focus: Saponins (verbascosaponin and related glycosides) are present at approximately 1–3% dry weight in leaves and are responsible for expectorant and surfactant-like activity, with moderate oral bioavailability enhanced by their amphiphilic nature. Iridoid glycosides including aucubin (~0.5–1% dry weight) contribute [anti-inflammatory](/ingredients/condition/inflammation) activity. Flavonoids including luteolin, apigenin, kaempferol, and hesperidin are present at approximately 0.3–1.2% dry weight in aerial parts; luteolin and apigenin demonstrate notable bioavailability when consumed as aqueous extracts (tea). Phenylethanoid glycosides, particularly verbascoside (acteoside), are found at 0.5–2% dry weight and exhibit [antioxidant](/ingredients/condition/antioxidant) and [antiviral](/ingredients/condition/immune-support) properties. Mucilaginous polysaccharides (arabinogalactans and uronic acid-rich compounds) are present at roughly 3–10% dry weight in leaves and flowers, contributing to demulcent and expectorant effects; these are water-soluble and readily extracted in teas. Tannins (catechic type) are found at approximately 0.2–0.5% dry weight, providing mild astringency. Coumarins including coumarin and umbelliferone are present in trace amounts (<0.1%). Sterols such as beta-sitosterol are present in small quantities (~0.1% dry weight). Mineral content includes moderate potassium, calcium, and magnesium, with trace iron and zinc, though specific concentrations are not well-characterized in literature. Vitamins are not documented in significant concentrations. Bioavailability note: Aqueous extraction (infusion) preferentially extracts mucilages, flavonoids, and saponins; ethanol tinctures better extract verbascoside and iridoids. Whole-leaf preparations retain fiber content (~15–20% dry weight, mostly cellulose and hemicellulose) with negligible nutritional contribution.

## Dosage & Preparation

No clinically studied dosage ranges are available. Traditional preparations include teas, decoctions, and oils, but standardization is lacking. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Mullein is generally well-tolerated with few reported adverse effects when used appropriately. Seeds should be avoided as they contain rotenone, a potentially toxic compound. No major drug interactions are documented, though theoretical interactions with respiratory medications may occur. Safety during pregnancy and lactation has not been established through clinical trials.

## Scientific Research

Current research lacks human clinical trials, RCTs, or meta-analyses specifically on Verbascum thapsus, with no PubMed PMIDs provided. Most evidence stems from in vitro and animal studies supporting its traditional uses.

## Historical & Cultural Context

Great Mullein has been used since ancient times in European folk medicine for respiratory issues, [inflammation](/ingredients/condition/inflammation), and wounds. It was also utilized by Native Americans for coughs and breathing problems.

## Synergistic Combinations

Elderberry, Echinacea, Licorice root, Thyme, Marshmallow root

## Frequently Asked Questions

### How much mullein should I take for respiratory issues?

Traditional dosages range from 3-4 grams of dried herb daily as tea, or 2-4 ml of tincture three times daily. However, standardized clinical dosing guidelines have not been established through controlled trials.

### Can mullein help with COVID-19 or flu?

Laboratory studies show antiviral activity against influenza A with up to 90% viral load reduction in cell cultures. However, no human trials have tested mullein specifically against COVID-19 or seasonal flu viruses.

### Is mullein safe to smoke for lung problems?

While traditionally smoked for respiratory issues, inhaling any combusted plant material can irritate airways and is not recommended. Tea or tincture preparations provide safer methods to obtain potential benefits.

### What parts of the mullein plant are used medicinally?

The leaves and flowers are primarily used for medicinal preparations, containing the highest concentrations of beneficial compounds like verbascoside and mucilage. Seeds should be avoided due to rotenone content.

### How long does it take for mullein to work for cough?

Traditional use suggests respiratory benefits may be noticed within 24-48 hours of consistent use. However, no controlled studies have established specific timeframes for symptom improvement or optimal treatment duration.

### Does mullein interact with common medications like antibiotics or cough suppressants?

Mullein has not been reported to have significant interactions with antibiotics or cough suppressants in clinical literature, though its expectorant properties may theoretically work synergistically with these medications. However, combining mullein with prescription cough suppressants (dextromethorphan) may reduce the suppressant's effectiveness since mullein promotes mucus clearance. Consult a healthcare provider before combining mullein supplements with any prescription respiratory medications to ensure safety and efficacy.

### Is mullein safe for children and pregnant women?

Mullein leaf tea has been traditionally used for children's coughs and is generally regarded as safe, though it should be given in age-appropriate amounts and avoided in very young infants. Pregnant women should consult their healthcare provider before using mullein supplements, as safety data in pregnancy is limited despite its long traditional use. Breastfeeding women should also seek medical guidance before supplementing, as compound transfer through breast milk has not been thoroughly studied.

### What does the scientific evidence actually show about mullein's effectiveness compared to conventional treatments?

Most evidence for mullein comes from in vitro and animal studies showing antiviral and antibacterial activity, with limited robust clinical trials in humans comparing it directly to standard cough medicines or antibiotics. A 2023 study demonstrated antiviral effects against influenza A in laboratory settings, but translating these findings to real-world human efficacy requires larger, controlled clinical studies. While traditional use supports its benefit for bronchitis and cough, evidence quality is considered moderate-to-low compared to FDA-approved respiratory treatments.

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