Daily immune support. Powered by Mushroom Mycelium. This 7-species blend was specially formulated by Paul Stamets for daily foundational immune support. Stamets 7: Supports an engaged and balanced immune response. Supports the body in adapting to physical, mental, and environmental stress factors. Promotes respiratory, digestive, circulatory, cellular, lymphatic, and systemic functions for foundational immunity. No. 1 best-selling Mushroom brand in the U.S. (Source: SPINSscan Natural / Natural Products Supermarkets > S2MM / Total US - Natural Channel / Mushrooms Ingredient Report / 52 Wlks Ending 12/26/2021). Bee friendly. Fungi Perfecti - makers of Host Defense Mushrooms - was founded by renowned mycologist Paul Stamets to build a bridge between people and fungi. We specialize in mycelium-based supplements for immune support and whole-body wellness. Sustainably grown in the USA, our mushroom mycelium is cultured on organic brown rice. Host Defense formulations are based on scientifically validated data to ensure quality and safety. - Paul Stamets.