02/26/2026
Mullein leaf tea has a long history in traditional medicine as a “lung tonic” or “lung cleaner” used to help manage respiratory issues by acting as an expectorant to loosen mucus, phlegm and even helping to clear deposits. It is often used to soothe irritated airways, reduce coughs, and support lung function after, or during, exposure to smoke and environmental pollutants.
To elaborate, mullein contains saponins, which act as natural detergents to help loosen, thin and break down mucus and phlegm in the lungs, making it easier to cough up.
The leaves and flowers contain mucilage, a gelatinous substance that coats, soothes, and protects irritated mucous membranes in the throat and lungs, often reducing the harshness of a “smoker’s cough”.
Mullein contains compounds like flavonoids and verbascoside, which have shown potential in reducing inflammation in the airways.
For those quitting smoking, it helps the body’s natural cleansing process to remove tar and mucus buildup.