Mullein is an expectorant, a substance that thins mucus (phlegm) and makes it easier to cough up. Expectorants help break up mucus to get it out of your system.
When you have lung and throat issues, using mullein may relieve some of your discomfort. Its flowers and leaves contain mucilage, which coats mucous membranes (the moist linings inside your respiratory tract) with a film, reducing inflammation.
Because of its anti-inflammatory effects, salves, and oils that contain mullein can also help relieve pain and irritation in skin wounds.
Mullein contains antioxidants, including vitamin C and flavonoids (substances found in fruits and vegetables). Antioxidants protect cells from free radicals, unstable molecules that damage your cells.