Plantago lanceolata L. (the species the EMA monograph covers) · herb
Evidence tier: traditional
A common "weed" with potent traditional use for bites, stings, wounds, and mild gut irritation.
Mucilage. The leaf is rich in polysaccharide mucilage that forms a slippery film over the lining of the mouth and throat, physically coating irritated tissue and damping the cough reflex. This is a demulcent effect and it is the only mechanism the EMA leans on. The iridoid glycoside aucubin is often credited with antimicrobial and anticatarrhal activity and the EMA assessment notes it may possess such activity, but that is a laboratory observation, not a demonstrated clinical mechanism.
Traditional use, and essentially nothing else. The EMA HMPC has a final European Union herbal monograph for plantain leaf, and it is a TRADITIONAL herbal medicinal product registration: a demulcent for the symptomatic treatment of oral or pharyngeal irritation and associated dry cough, and for relief of cough associated with a cold. Traditional use registration means precisely what it says: the plausibility rests on documented long standing use, at least 30 years including 15 in the EU, and NOT on clinical trial evidence, because there is not enough of it to assess. The EMA assessment report leans on exactly that: use documented since Dioscorides, folk records from across northern and eastern Europe, and a mucilage mechanism that makes a soothing coating effect believable. Two things must be said plainly. First, the species matters and the seed has the wrong one. The EMA monograph is for PLANTAGO LANCEOLATA (ribwort plantain) leaf. There is NO EMA monograph for Plantago major, the species the seed names. Second, there is no meaningful modern clinical trial base for either species: the wound healing and antimicrobial claims rest on in vitro and animal work, and EMA silence about anything beyond throat irritation and dry cough is not a clearance for those uses. This is an ingredient that is honestly and unembarrassingly traditional. It should be described that way and no further.
Topical: fresh leaf poultice as needed. Internal tea: 1 tsp dried leaf per cup, 2 to 3 times daily.
Extremely safe, used in food and traditional medicine for millennia.
Pregnancy: avoid
Breastfeeding: avoid
Active compounds: mucilage polysaccharides, aucubin, acteoside
Remedies using Plantain Leaf · 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.