Fungi Perfecti LLC

Wellness and Fitness ServicesWashington, United States51-200 Employees

Fungi Perfecti LLC is a family-owned business that specializes in mushroom mycelium-based dietary supplements, operating under the Host Defense Mushrooms brand. Founded in 1980 by Paul Stamets, the company is based in Olympia, Washington, near the Olympic Rainforest. It emphasizes rigorous mycological research and pursues applications that span human health as well as ecological initiatives like mycofiltration and mycoremediation.

Its products target wellness-focused consumers seeking natural supports derived from fungi to promote health and resilience. Over its history, the company has established a reputation as one of the most documented and long-standing mushroom supplement makers in the United States. More recently, in 2026 it published two studies on immune-balancing effects and launched Grateful Dead Gummies.

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