Licorice root (Glycyrrhiza glabra) has a long history of traditional use in supporting throat health, including the vocal cords. In many traditional systems of medicine, such as Traditional Chinese Medicine (TCM) and Ayurveda, licorice root is used to soothe sore throats, reduce cough, and alleviate hoarseness. The herb is thought to have demulcent (soothing), anti-inflammatory, and expectorant properties, which may contribute to its use for vocal cord and throat discomfort.

Scientific evidence specifically supporting licorice root for vocal cord health is limited. Some small studies and laboratory research indicate that licorice has anti-inflammatory and soothing effects on mucous membranes, which may theoretically benefit the throat and vocal cords. For example, a few clinical trials have demonstrated that licorice gargles can reduce postoperative sore throat in patients following intubation, likely due to its anti-inflammatory action. However, there is a lack of robust clinical trials directly assessing its efficacy for vocal cord function or long-term vocal health in singers or speakers.

In summary, the use of licorice root for supporting the vocal cords is primarily justified by tradition, with only modest scientific support focused more on general throat soothing rather than direct vocal cord benefits.