Chaga or Inonotus obliquus grows mainly on beeches Eastern Europe and the Russian Arctic. The inhabitants of Siberia it boils infusions to treat cancer and called her a "gift from God". The most important active ingredient Chaga is betulinic acid, which chaga "sucks" right from birch. Since the 90s this substance is studied for its anticancer and antiviral effects. Especially its ability to apoptosis, or the process of cell "suicide". It is a process in which biochemical reactions lead to programmed cancer cell death. Studied are also its antiparasitic and anti-inflammatory effects. Among other therapeutically valuable substances Chaga polysaccharides, antioxidants (melanin) and sterols.