Fungi Perfecti® - makers of Host Defense® Mushrooms™ - is a family-owned company specializing in mushroom mycelium-based supplements. Founded by Paul Stamets in 1980 with the goal of building a bridge between people and fungi, Fungi Perfecti® has become synonymous with cutting-edge mycological research and innovative mycological solutions.

Under Paul’s visionary leadership, we have made significant breakthroughs revealing the power and potential of mushroom mycelium. This is the foundation of the Host Defense® brand. Based near the Olympic Rainforest in Washington state, we are one of the best-documented and longest-standing mushroom supplement companies in the USA.

Since its inception, Fungi Perfecti® has been the industry leader in research on the endless potential for the use of fungi in everything from water filtration (mycofiltration) and ecological rehabilitation (mycoremediation), to using beneficial mushrooms in the form of supplements to support human health. Our continued mission is to explore, study, preserve, and spread knowledge about the use of fungi for helping people and planet.*