Host Defense Breathe Extract supports respiratory and immune health with mushroom mycelium. This formula blends Chaga Reishi and Cordyceps to help support oxygen uptake healthy respiratory function and a balanced immune response. It also supports the respiratory tract and healthy energy levels making it a useful daily option for lung wellness. Suggested use is one full dropper twice daily with food or on an empty stomach or as directed by a healthcare advisor. Host Defense products contain no fillers and are third party tested for quality and safety. Made by Fungi Perfecti a family owned company founded in 1980 by Paul Stamets this supplement is grown in Washington State using cultivated mushroom mycelium and fruit bodies.