Mullein has gone from a wildflower your grandparents might have recognised to one of the fastest-growing herbal supplement categories in the UK. Here's what it actually is, what the research says, and what to look for when buying mullein in 2026.
📋 In This Guide
What Is Mullein? A Brief History of Mullein in Traditional Medicine What's Inside Mullein? Key Compounds What Does the Research Say? Mullein Formats: Tea vs Drops vs Gummies vs Capsules Mullein Tea: The Traditional Route Mullein vs Other Respiratory Herbs Side Effects and Safety What to Look for When Buying Mullein in the UK PURETREX Mullein Products Frequently Asked Questions
What Is Mullein?
Mullein (Verbascum thapsus) is a biennial flowering plant belonging to the Scrophulariaceae family. Native to Europe, northern Africa, and western Asia, it has since naturalised across North America, South America, and Australia. It grows in a wide range of habitats — roadsides, meadows, waste ground, and disturbed soils — and can reach heights of up to two metres.
The plant is instantly recognisable: large, soft, woolly leaves covered in fine hairs form a basal rosette in the first year, followed by a tall flowering spike with small yellow flowers in the second year. The leaves and flowers are the parts most commonly used in herbal preparations.
Mullein has accumulated a remarkable number of common names over the centuries: Aaron's Rod, Flannel Plant, Velvet Plant, Candlewick, Hag's Taper, and Beggar's Blanket, among many others. During the 1849 California gold rush, miners reportedly used dried mullein stalks dipped in tallow as torches — earning it the name "miner's candle."
Mullein is classified as a food supplement and herbal ingredient in the UK. It is not a medicine and is not intended to diagnose, treat, cure, or prevent any disease.
A Brief History of Mullein in Traditional Medicine
Mullein's use in herbal practice stretches back thousands of years and spans multiple continents and medical traditions.
Ancient Greece & Rome (1st Century AD)
The Greek physician Dioscorides referenced mullein in De Materia Medica — one of the foundational texts of Western herbal medicine. The Romans dipped dried mullein stalks in rendered fat to create funeral torches.
Medieval & Early Modern Europe
Mullein was a widely recognised cottage remedy across Europe. The leaves were prepared as infusions (teas) and the flowers were macerated in oil. The plant held a prominent place in European herbalism for centuries.
Native American Traditions
When mullein was introduced to North America, various indigenous peoples adopted it into their herbal practices. The Mohegans, Navajo, and other nations used mullein in smudging and as a topical preparation.
Ayurvedic & Traditional Chinese Medicine
While not a primary ingredient in either tradition, related Verbascum species have been referenced in traditional medical systems across the Middle East and Central Asia.
The consistent thread across these traditions is the use of mullein leaves and flowers in preparations related to the respiratory tract — though traditional use does not constitute evidence of efficacy by modern scientific standards.
What's Inside Mullein? Key Compounds
The chemical composition of mullein has been characterised in published phytochemical research. The plant contains a diverse range of bioactive compounds:
Large sugar molecules that form a gel-like substance when mixed with water. Classified as a demulcent — forms a soothing film over mucous membranes.
Naturally occurring plant glycosides. Surface-active compounds that create a lather when mixed with water. Saponin-containing plants are traditionally classified as expectorants.
A class of polyphenolic compounds found widely in fruits, vegetables, and plant materials. Among the most studied plant compounds in nutrition science.
A class of compounds found in numerous medicinal plants. Published research has examined iridoid glycosides in the context of various biological activities.
A compound found in mullein that has been the subject of laboratory research. Present in several other plant species and has attracted attention in phytochemistry.
Present in smaller quantities, these contribute to mullein's overall chemical profile and complexity as a whole-plant preparation.
The combination of mucilage and saponins makes mullein unusual — it sits at the intersection of demulcent (soothing) and expectorant (loosening) categories. Most herbs fall into one or the other.
What Does the Research Say?
Published research on mullein covers several areas. The following is a factual summary — not health claims or efficacy statements.
🔬 Antimicrobial Research
Laboratory studies have examined mullein extracts for activity against various bacterial species. A study by researchers at Clemson University tested mullein against several strains including Staphylococcus aureus, Klebsiella pneumoniae, and Escherichia coli, reporting positive observations in the laboratory setting. These are in vitro results and do not directly translate to human outcomes.
🦠 Antiviral Research
A 2023 study examined Verbascum species for activity against influenza A and herpes simplex viruses in laboratory conditions. An earlier study from 2000 found that combining the antiviral drug amantadine with mullein infusion produced greater antiviral activity against influenza than either substance alone in laboratory models.
👂 Ear Pain Research
Two double-blind trials involving over 250 children compared a herbal ear drop preparation containing mullein, garlic, St. John's wort, and calendula against a standard anaesthetic ear drop. The herbal preparation performed comparably for pain reduction. However, these used a multi-herb combination, making it difficult to attribute effects specifically to mullein.
🧪 Anti-inflammatory & Antioxidant Research
Laboratory studies have examined verbascoside for potential effects on oxidative stress markers and inflammatory pathways. One study reported that verbascoside reduced the production of certain free radicals in experimental conditions. A separate study found antioxidant activity in cell protection assays.
Important context: The human clinical evidence for mullein is limited. The majority of published research consists of in vitro studies, animal models, and a small number of human trials using multi-herb preparations. This is common for many traditional herbal ingredients — long historical use exists alongside a relatively early-stage modern evidence base.
Mullein Formats: Tea vs Drops vs Gummies vs Capsules
| Format | Pros | Considerations |
|---|---|---|
| Tea (Dried Leaf) | Traditional method; releases mucilage directly; soothing ritual | Variable concentration; requires straining (leaf hairs); preparation time |
| Liquid Drops | Concentrated extract; fast absorption; easy dose adjustment; sublingual option | Taste may not suit everyone |
| Gummies | Precise dosing; pleasant taste; convenient; easy to combine with other ingredients | May contain sugar (check label) |
| Capsules | Precise dosing; no taste; simple | Mucilage released in gut, not throat; requires swallowing |
| Mullein Oil (Topical) | Traditional ear application | Not an oral supplement; topical use only |
There is no single "best" format — each delivers mullein's constituents differently. The best choice depends on personal preference and routine.
Mullein Tea: The Traditional Route
Preparation
1–2 teaspoons dried mullein leaf per cup. Steep 10–15 min in hot (not boiling) water. Strain through fine muslin or coffee filter.
Taste Profile
Slightly earthy, slightly sweet. Less bitter than many herbal teas. Generally well-tolerated. Some add honey or lemon.
Key Warning
Fine hairs on mullein leaves can irritate the throat if not filtered out. Use fine cloth, muslin, or a paper coffee filter — never skip this step.
While tea is the most traditional format, standardised extracts in drops or gummies offer more consistent dosing without the need for preparation or straining equipment.
Mullein vs Other Respiratory Herbs
| Herb | Key Compounds | Traditional Classification | Relationship to Mullein |
|---|---|---|---|
| Marshmallow Root | High mucilage content | Demulcent | Higher mucilage but lacks saponins. Often combined with mullein. |
| Elderberry | Flavonoids, anthocyanins | Different category | Complementary role. Frequently paired in modern formulations. |
| Thyme | Thymol, carvacrol | Aromatic herb | Volatile compounds — chemically distinct from mullein's profile. |
| Lungwort | Various phenolics | Traditional respiratory herb | Different active compounds. Historical use based on Doctrine of Signatures. |
| Mullein | Mucilage + saponins + flavonoids | Demulcent & expectorant | Uniquely bridges both categories. |
Side Effects and Safety
Mullein leaf and flower are generally regarded as safe when used in standard supplement dosages. No widely reported serious adverse effects exist in published literature for oral mullein preparations.
⚠️ Mullein Leaf Hairs
The fine, woolly hairs on mullein leaves can cause throat and skin irritation if not properly filtered. This is primarily relevant when making tea from loose dried leaves — pre-made supplements (drops, gummies) do not have this issue as the extract is processed and filtered during manufacturing.
⚠️ Mullein Seeds — Do Not Consume
Mullein seeds contain rotenone, a compound that is toxic if consumed in significant quantities. Seeds are not used in commercial supplements, which use leaf and/or flower extracts only. This is only a concern if wildcrafting without proper knowledge.
⚠️ Pregnancy & Breastfeeding
Insufficient safety data for mullein use during pregnancy or breastfeeding. Standard precautionary advice is to avoid use during these periods unless directed by a healthcare professional.
No significant drug interactions have been widely reported for mullein. However, anyone taking prescription medication should consult their doctor or pharmacist before starting supplementation.
What to Look for When Buying Mullein in the UK
Quality Buying Checklist for Mullein
- Extract ratio stated — 10:1, 20:1, or 50:1 indicates concentration level. Products without a ratio may contain simple ground leaf
- Plant part specified — leaf extract (highest mucilage + saponins), flower extract (higher flavonoids), or whole plant. Check the label
- Complementary ingredients with EFSA claims — products with vitamin C offer authorised immune system claims
- Format suits your routine — drops for flexibility, gummies for convenience, tea for the traditional experience
- Third-party testing — independent lab verification for purity, heavy metals, and microbiological safety
- UK manufactured under GMP — Food Standards Agency oversight
- No unnecessary fillers or artificial colours
- Sugar content checked — especially for gummies. Sugar-free options exist
✦ EFSA-Authorised Claims for Complementary Ingredients
- Vitamin C contributes to the normal function of the immune system
PURETREX Mullein Products
8-in-1 Mullein Gummies — Quercetin, Bromelain, Elderberry & Vitamin C
- Mullein leaf extract 1,000mg (50:1 concentration)
- Quercetin 200mg + bromelain 250mg
- Elderberry extract 10:1 (300mg)
- Marshmallow root extract 10:1 (400mg)
- Ginger root extract 20:1 (250mg)
- Licorice root extract 10:1 (200mg)
- Vitamin C 250mg (EFSA-authorised immune claim)
- Sugar-free, vegan, pineapple flavour — 60 gummies
Elite Mullein Drops — Elderberry, Lungwort, Thyme & Peppermint
- Organic mullein leaf extract — concentrated formula
- Elderberry + lungwort + thyme + licorice root
- Peppermint oil for palatability
- BioPerine® for enhanced absorption
- Alcohol-free, sugar-free, vegan
- 60ml bottle with precision dropper
- 1ml daily — sublingual or mixed with water
Both products ship same-day before 1PM Mon–Fri / 10AM Sat · Free UK delivery over £60