Four Sigmatic Chaga Mushroom Elixir Mix 20 × 3 gFour Sigmatic Chaga Mushroom Elixir Mix 20 3 g The Chaga mushroom (Inonotus obliquus) is also called the "king of mushrooms", "forest diamond" or "mushroom of immortality". It grows in the northern hemisphere, especially on birches. Chaga, like other so called functional fungi, contains several hundred biologically active substances that have a very wide range of beneficial effects on the human body. Probably the best known of these are beta glucans,