Key takeaways
- Mullein has been used for chest and throat comfort for centuries in Europe and America.
- Its three standout compound groups are saponins, mucilage and flavonoids.
- Existing research is mostly laboratory based, backed by long traditional use.
- A liquid extract is the fastest, simplest way to take mullein daily.
- Mullein is generally gentle for healthy adults.
Drive along almost any country road in the United States in summer and you'll likely pass wild mullein. Look for a tall, straight stalk topped with a column of small yellow flowers, rising from a base of broad, pale-green leaves so fuzzy they are sometimes called "cowboy toilet paper." The plant loves dry, disturbed ground and grows in all 50 states.
Behind that rugged look is one of the most respected breathing herbs in traditional wellness. Here is what you should know.
A long history in herbal practice
Mullein appears in European herbal writings going back centuries, typically recommended as a leaf tea to comfort the chest during coughs. In some regions people smoked the dried leaves to ease breathing. When mullein reached North America with early settlers, it was adopted into home remedies across the continent. Herbalists traditionally classify it as an expectorant, supporting the removal of phlegm, and a demulcent, soothing and coating irritated membranes.
What's actually in the leaf
A handful of natural compound groups are responsible for mullein's reputation:
Saponins
Natural compounds that create foam in water and are closely associated with mullein's ability to help loosen stubborn mucus.
Mucilage
A soluble fibre that swells into a smooth gel, soothing a scratchy or dry throat in much the same way honey does.
Flavonoids and iridoids
Antioxidant compounds such as aucubin and catalpol that have shown calming, anti-inflammatory effects in laboratory testing.
What the research shows so far
In lab settings, mullein extracts have demonstrated antioxidant, anti-inflammatory, antibacterial and antiviral activity. Mullein was also included in a naturopathic ear-drop formula studied in children. The research community is now looking for larger clinical studies that track breathing outcomes from mullein on its own.
How people use mullein
| Form | How it's used | Helpful tip |
|---|---|---|
| Tea | Dried leaves steeped 10–15 minutes in hot water | Pour through a coffee filter to catch the tiny leaf hairs. |
| Liquid extract / drops | One dropper serving, on its own or in water | No brewing required and easy to keep consistent. |
| Capsules | Dried, powdered leaf | Tasteless option, though multiple capsules are usually needed. |
Safety first
Mullein is widely considered a gentle herb for healthy adults. The most common issue is mild skin irritation from touching fresh leaves. Research during pregnancy and breastfeeding is limited, so speak with your doctor first in those cases, or if you take prescription medication.
Always have a persistent cough, breathlessness, wheezing or bloody phlegm checked by a healthcare professional to identify the underlying cause.
Sources
- Cleveland Clinic – "Mullein: Benefits and Side Effects." health.clevelandclinic.org/mullein-benefits
- Turker AU, Gurel E. "Common mullein (Verbascum thapsus L.): recent advances in research." Phytotherapy Research, 2005.
- Mahdavi S, et al. "Antioxidant and antibacterial activity of Verbascum species." Journal of Medicinal Plants, 2020.
- Sarrell EM, et al. "Naturopathic treatment for ear pain in children." Pediatrics, 2003.
Common questions
What are the main benefits of mullein leaf?
Mullein leaf is traditionally used to support mucus clearance, soothe the throat and comfort the chest. It also contains antioxidant flavonoids.
Does wild mullein grow in the United States?
Yes. Wild mullein grows in all 50 states, especially along roadsides, fields and other dry, open ground.
How should I take mullein?
Mullein can be taken as a strained tea, a liquid extract or capsules. Liquid extracts are the quickest and most consistent daily option.