Mullein 1:1500ml Support your respiratory health with Mullein 1: 1, a traditional herbal extract made from Verbascum thapsus leaf. This carefully prepared 1: 1 extract delivers the full spectrum of mullein's soothing properties in an easy to dose liquid form, designed to support clear airways and healthy lung function. At a weekly dose of 30 to 170mL, you get consistent, potent herbal support for your respiratory wellness.