Chaga is a strange looking fungus that looks more like charcoal than a mushroom. If you see it growing on a tree, you might think it was simply wood that had been charred by a fire or struck by lightning. But inside this fungi is a bright orange color.
Chaga grows almost exclusively on birch trees.
The medicinal properties of chaga include use in treatment of cancers and as a topical treatment for swelling or wounds. It also has a mild blood sugar lowering effect.