Which herb contains glycyrrhizin and acts as a demulcent and adrenal tonic?

• A. Ginkgo biloba
• B. Glycyrrhiza glabra
• C. Grindelia robusta
• D. Hamamelis virginiana

Answer: (B)

The herb that fits here is licorice root. It contains glycyrrhizin, a saponin compound that gives two classic actions: it acts as a demulcent, forming a soothing, protective mucilage over irritated mucous membranes (helpful for sore throat, coughing, and GI irritation); and it has adrenal-tonic properties, supporting adrenal function and mimicking some glucocorticoid effects, which is why it’s described as an adrenal tonic.

Among the options, licorice is the only one known for containing glycyrrhizin and for its dual demulcent and adrenal-supportive actions. The others do not contain glycyrrhizin and are not described primarily as demulcents or adrenal tonics: ginkgo biloba is mainly noted for vascular effects; grindelia robusta is associated with bronchial resins for respiratory support; witch hazel is valued for its astringent tannins and topical use.

Note that long-term or high-dose licorice can cause potassium loss and hypertension, so use with caution in those contexts.