Swisse Ultiboost Lung Health supplement contains a premium quality formula with all-natural herbs, vitamins, and minerals that support lung and respiratory health while maintaining a healthy immune system. Traditionally used in Western Herbal and Chinese medicine, astragalus is a natural lung tonic to help clean out irritants, and reishi mushroom helps support a healthy functioning respiratory system. Mullein is a natural demulcent that helps soothe inflamed surfaces in the respiratory system, while thyme acts as a natural expectorant to help clear excess mucus and improve cough reflex. Each tablet contains zinc, selenium, and vitamins A & C to support a healthy immune system and provide antioxidant support to protect your lungs against free radical damage caused by pollution.