Mullein Flowers (Verbascum thapsiforme)

Mullein flowers can strengthen the upper respiratory tract due to expectorant and mucus liquefying properties.


The biennial plant is widespread in Europe, temperate Asia and North America and can grow up to 2 m high. Large yellow flowers in apical spike-like racemes.


Mullein flower blossoms contain approximately 3% watersoluble mucilage polysaccharides, flavonoids (rutin, hisperidine, diosmin) and saponin (verbascosaponine) with expectorant properties.

Possible uses

Several effects of mullein flowers can strengthen upper respiratory tract mechanisms. The contained mucilage can protect and moisten dry mucous membranes, relieve coughing and liquefy viscous mucus. The saponins can promote the expectoration of mucus.

Important to know

Expectorant actions may be due to the plant’s saponin content. Avoid confusion with goldenrod (Solidago species).