Verbascum thapsus L. · herb
Evidence tier: traditional
A classic respiratory remedy, soothes dry coughs and helps loosen stuck mucus.
Mucilage in the flower and leaf swells into a gel that physically coats an irritated throat, the same demulcent action as marshmallow root, which is why EMA's registered indication is limited to sore throat with dry cough rather than anything happening deeper in the lungs. Saponins are proposed to loosen mucus and verbascoside has anti inflammatory activity in the laboratory. Neither of those has been shown to occur in a person, and no mechanism has ever been demonstrated for the lung cleansing claim.
Mullein has essentially no clinical evidence in humans, and everything credible about it is a traditional use registration. Europe's regulator, the EMA HMPC, holds a monograph on Verbasci flos, mullein FLOWER, concluding on the basis of long standing use that it can be used for relief of a sore throat associated with dry cough and cold, in adults and adolescents over 12. The assessment report is explicit that there are no clinical efficacy data supporting well established medicinal use; the registration exists because the use is old and plausible, not because it was tested. Note the part almost every product page gets wrong: the monograph covers the FLOWER. The supplements and teas that sell in volume are mullein LEAF, which has no EMA monograph, no registered indication and no controlled trial. For the claims mullein is actually bought for, meaning lung cleansing, clearing mucus, easing asthma, quitting smoking, ear infections and general respiratory support, there is no adequate human evidence whatsoever. The antiviral activity that circulates online is laboratory work on plant extracts against viruses in cell culture, which says nothing about what happens to a person who drinks the tea. The only randomised controlled trial of any consequence in the modern literature tested a Verbascum preparation on episiotomy wound healing, which is a topical, obstetric use nobody is buying it for. This is a herb where the correct answer is that we do not know, and where the demulcent soothing of an irritated throat is the only thing that is even plausible. Grade it traditional and let the tradition speak for itself.
Not established. EMA registers preparations of mullein FLOWER for adults and adolescents over 12; follow the registered posology of the specific product. Mullein LEAF, which is what most supplements and teas actually contain, has no monograph and therefore no evidence based dose at all. Traditional practice is an infusion of the dried leaf or flower, strained carefully, because the fine hairs on the leaf irritate the throat.
As tea: 1 to 2 tsp dried leaf per cup, 3 times daily. Strain through fine cloth to remove fine hairs.
Generally very safe. The fine hairs on leaves can irritate the throat, strain carefully.
Pregnancy: avoid
Breastfeeding: avoid
Active compounds: mucilage polysaccharides, verbascoside (acteoside), saponins, iridoid glycosides, flavonoids
Remedies using Mullein · Browse by body system · Check it against what you take
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.