Scientifically known as Hericium Erinaceus, this mushroom is sourced from the United States. The bioactive compounds of importance are Hercinones, Erinacines, Ergothionine, and Beta Glucans. Hercinones are primarily found in the fruiting body, and Erinacines are only found in the mycelium. To ensure that you feel the benefits of all the bioactive compounds of Lions Mane we utilize a small amount of mycelium (<15%) along with the Fruiting Body. The Lions Mane mushroom used to make our extracts are USDA Certified Organic, ensuring premium quality and purity.