Plantain (Plantago major) has a long history of use in traditional herbal medicine for soothing the throat and respiratory tract, which includes indirect support for the vocal cords. Historically, both European and North American herbalists have used plantain leaves as a demulcent—an agent that relieves irritation of the mucous membranes by forming a protective film. This traditional use is based on the plant’s mucilage content, which can help coat and soothe the throat, potentially easing discomfort due to overuse or irritation of the vocal cords.

While plantain is commonly included in herbal teas and syrups for coughs, sore throats, and hoarseness, its direct effect on the vocal cords specifically has not been robustly studied in clinical trials. Most supporting evidence is anecdotal or comes from historical herbal texts rather than modern scientific research. Some in vitro and animal studies suggest anti-inflammatory and wound-healing properties, which could theoretically benefit irritated mucosal tissue, but there is insufficient direct scientific evidence to confirm efficacy for vocal cord health or function.

In summary, the use of plantain to support the vocal cords is justified by traditional use rather than strong scientific validation. Evidence rating is low to moderate (2/5), reflecting the predominance of historical rather than clinical support.