Nammex, a US supplier of organic functional mushroom extracts has published its latest study establishing a multi-analytical framework to identify authentic chaga canker and assess its quality of commercial dietary supplement products. Chaga is a fungal product, but not technically a mushroom. Chaga is the common name for the sterile canker that forms on birch trees (Betula spp.) as the tree’s response to infection by a pathogenic fungus, Inonotus obliquus.