"In 2002, Didukh and Wasser rejected the name A. blazei and called the Brazilian fungi Agaricus brasiliensis; this was rejected by Kerrigan through genetic and interfertility testing on several fungal strains. Samples of the Brazilian strains called A. blazei and A. braziliensis proved to be genetically similar to, and interfertile with, the North American population of Agaricus subrufescens. These tests also found European samples called A. rufotegulis to be of the same species. Because Agaricus subrufescensis the oldest name, it is traditionally considered the scientifically, historically correct name."

The mycelium contains higher levels of medicinal compounds than the fruit body, and alcohol is the most effective way to extract them from the mycelium. ²⁵  Alcohol also helps as a carrier medium to more effectively deliver the compounds to the body tissues.

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