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a cup of mullein tea on a table next to mullein flowers and leaves

Answer:

Despite laboratory research suggesting that mullein tea may be useful for a variety of respiratory, infectious, and other conditions (Gupta, Phytother Res 2022; Riaz, Rev Bras Farmacogn 2013), there is very little clinical research to support these uses.

We discuss this in more detail in our full article, covering mullein tea for reducing hoarseness, coughing, bronchitis, whooping cough, symptoms of tuberculosis, COVID-19, the flu, herpes simplex virus, asthma and allergies, diarrhea, as well as its potential antibacterial and anticancer effects.

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