Key takeaways
- Wild mullein has been a go-to herb for chest comfort for centuries.
- Saponins, mucilage and flavonoids are its main active compound groups.
- Current evidence comes mostly from lab studies and traditional use.
- Liquid extracts offer the most convenient daily serving.
- It has a gentle safety profile for most healthy adults.
Wild mullein is the kind of plant you notice once and never forget. It spends its first year as a flat circle of oversized leaves covered in fine white hairs that make them feel like lamb's ear or soft flannel. In its second year it sends up a single stem, sometimes more than six feet tall, crowned with small five-petalled yellow flowers. It thrives in poor, dry soil along fields, fences and highways across three continents.
That rugged wildflower has become a favourite in natural respiratory wellness. Here is the story.
A long history in herbal practice
Herbal writings from across Europe mention mullein as a remedy for the chest, most often prepared as a gentle leaf tea sipped through bouts of coughing. In some places the dried leaves were even smoked to calm the lungs. Settlers carried the plant to North America, where it quickly found a place in home remedies. Herbalists have long described mullein as an expectorant, helping move phlegm upward, and a demulcent, soothing and protecting irritated tissues.
What's actually in the leaf
Several families of natural compounds explain mullein's reputation:
Saponins
Plant compounds that foam in water and are widely linked with mullein's ability to help loosen thick secretions.
Mucilage
A slippery, water-holding fibre that forms a comforting film over dry or scratchy throat tissue.
Flavonoids and iridoids
Antioxidant molecules, including aucubin and catalpol, that have shown calming and anti-inflammatory activity in lab studies.
What the research shows so far
Laboratory studies on mullein extracts have reported antioxidant, anti-inflammatory, antibacterial and antiviral activity. Mullein was also part of a naturopathic ear-drop blend tested in children. Researchers continue to call for larger clinical trials to measure how mullein alone affects breathing in people.
How people use mullein
| Form | How it's used | Worth knowing |
|---|---|---|
| Tea | Dried leaves infused in just-boiled water | Strain carefully; loose leaf hairs can irritate the throat. |
| Liquid extract / drops | A dropper serving, straight or in water | The simplest way to take a consistent amount every day. |
| Capsules | Powdered leaf in capsule form | Flavour-free, though several capsules may be needed. |
Safety first
Mullein is regarded as a gentle, low-risk herb for most healthy adults. Fresh leaves can mildly irritate sensitive skin when handled. Because research during pregnancy and breastfeeding is limited, talk with your doctor first in those cases, or if you take regular medication.
A cough that won't settle, shortness of breath, wheezing or blood in your phlegm should always be checked by a healthcare professional.
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
Why is wild mullein called a lung herb?
Wild mullein has been used for centuries to comfort the chest and throat, earning the folk name lungwort. Its saponins and mucilage are linked with mucus loosening and throat soothing.
Is mullein extract better than mullein tea?
A liquid extract is more convenient and easier to dose consistently, while tea must be carefully strained to remove fine leaf hairs.
Who should avoid mullein?
Pregnant or breastfeeding people and anyone on regular medication should consult a doctor before using mullein.