Looks like this mushroom might help in allergies as well!
Need to read up more on this mushroom!
The Medicinal Values of Culinary-Medicinal Royal Sun Mushroom (Agaricus blazei Murrill)
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3833359/
Suppressing effects of daily oral supplementation of beta-glucan extracted from Agaricus blazei Murill on spontaneous and peritoneal disseminated metastasis in mouse model.
http://www.ncbi.nlm.nih.gov/pubmed/15883813