United Kingdom based, Mycology Research Laboratories (MRL) was founded in 1997 and develops mycology (mushroom nutrition) and non-mycology products as dietary supplements or 'functional foods'.

MRL utilizes proprietary Japanese production technology to cultivate selected strains of the different mushrooms in California. These mushroom nutrition products are not extracts, but instead contain both the mycelium and primordia (young fruitbody) of the mushroom.