Chaga (Inonotus obliquus | чага in Russian), is one of our favourite mushrooms. In grows mostly on birch, in Circumboreal forests. A chaga 'tea' (or extraction) is a traditional drink in Siberia and some parts of Scandinavia.
We drink chaga because we think that the rich, dark brew, is delicious.
It is also a very popular drink among 'superfood' and 'elixir' enthusiasts. A Google search will give you a wide variety of literature about chaga's health benefits; many of those articles are not based on solid data, but a decent number are peer reviewed articles from very credible sources.
Origin: Quebec, Canada