Spanish Oregano (Lippia graveolens) has a long history of use in traditional herbal medicine, particularly in Central American and Mediterranean cultures. Traditionally, it has been employed to support respiratory health, which is closely related to the function of the mucus membranes in the respiratory tract. Folk uses have included making teas, tinctures, or infusions of the leaves to help soothe coughs, relieve symptoms of colds, and promote the clearance of phlegm—all actions that relate to the support of mucus membranes.

The reasoning behind these uses is largely attributed to the herb’s aromatic compounds, including thymol and carvacrol, which are thought to have mild antimicrobial and anti-inflammatory properties. These properties could theoretically help reduce irritation and support the health of mucus-producing tissues in the respiratory system. However, while these compounds are well-studied in other members of the Lamiaceae family (such as common oregano, Origanum vulgare), direct scientific studies on Spanish Oregano’s efficacy in supporting mucus membranes are limited.

In summary, use of Spanish Oregano for support of mucus membranes is justified primarily by tradition, and while there is some biochemical rationale, robust clinical or preclinical evidence is lacking. Thus, its use is best characterized as traditional with a modest evidence rating.