US Patent 7178285 Functional substrates for growth of culinary and medicinal mushrooms

Methods of increasing the amount of one or more functional compounds in medicinal mushroom biomass and mushroom mycelia by growing the mushrooms on a substrate that is high in the functional compound or compounds of interest is provided. More specifically, a method of increasing the amount of anthocyanins in mushrooms is provided. Mushrooms are grown on a substrate rich in anthocyanins, such as purple corn or other suitable red, purple or black-pigmented substrate, and incorporate the anthocyanins during growth. Mushrooms grown by this method, as well as methods of improving the growth rate and potency of mushrooms, are also provided.