Mushrooms have been widely studied in Japan, Korea and China to help maintain feelings of energy. Coriolus-MRL is not an extract but instead contains both the mycelium and the primordia (young fruitbodies) of Coriolus versicolor grown aseptically into a biomass. The biomass powder is then packed into 250 gram tubs. Each tub contains a spoon which supplies 2.0 g of powder. Mycology Research Laboratories utilizes proprietary production technology to cultivate mushrooms in California.