Chaga International - Siberian Chaga Mountains of Siberia Is Siberian Chaga Safe? Yes. Chaga is a dietary supplement. There are no known side-effects. Siberian Chaga is a non-toxic mushroom. Our superior Chaga extract, is wildcrafted - or grown organically in nature in the pristine birch forests in the mountains of Siberia. Chagamushroom.info~Site InfoWhoisTrace RouteRBL Check