If you discover a black, cancerous mass on a birch, you may be looking at a Siberian chaga mushroom. It can also, less commonly, be found growing ash, beech, elm or hornbeam.
Europeans have used chaga for centuries as a cure for digestive ailments, tuberculosis, and cancers of the liver and heart. [121]
The black “skin” was removed and the lighter inside boiled as tea. Being such a compact natural medicine made it a valuable, portable remedy for healers of old.
Modern scientific research has focused on chaga’s anti-cancer properties. In Russia, it has been approved to treat cancers of the breasts, cervix, stomach and lungs since 1955. [122]
A modern study conducted in 1998 showed that chaga extract does indeed inhibit the growth of cervical cancer cells under laboratory conditions. [123] Another study from the mid-90’s found the active compound betulin to cause growth inhibition and death of melanoma cells, also in lab. [124, 25]
Further research has confirmed that some of the active compounds of Siberian chaga do decrease cancer cell growth. [125, 126]
Although traditional healers used to peel off the black outside (probably because it looked unappetizing), the skin actually contains 30% betulin, a highly prized medicinal compound, [127] while the inside is rich in fungal lanostanes. So both parts would be valuable in preparing the tea.
Even better are chaga extracts that are made with not only the whole mushroom but also the mycelium, because the mycelium contains higher levels of medicinal proteins than the fruit body of the mushroom.
Other research has found chaga to possess powerful anti-viral properties. In 1996, two studies published results of inhibitory effects on both influenza virus [127] and HIV. [128] Considering the nature of viruses, the most likely scenario is that chaga works on viruses by enhancing the body’s own immune system, a theory confirmed by a paper published in 2002 and another in 2005. [25, 129] The same mechanism may explain the reported anti-inflammatory effect of chaga. [130]
An alcohol extraction of chaga was reported to lower elevated blood sugar levels. [131] Chaga also contains powerful antioxidants. [132, 133]
As an amusing aside not related to human health, Siberian chaga may even be used as a tree medicine. Paul Stamets relates a story of a Quebec arborist using a chaga poultice to heal chestnut blight. Not only does it cure the tree, but the tree even becomes resistant to further infections of blight after having been treated. [134]
Note: The statements on this page have not been evaluated by the Food and Drug Administration. This article is not intended to diagnose, treat, cure or prevent any disease. Never use any medicinal mushroom or herb without prior approval by medical doctor.
Credit to Paul Stamets for research and source material.
Dr. Rafael has worked in the natural health field since finishing Chiropractic College in the mid-90’s. He currently specializes in medicinal fungi in cooperation with Cordyceps Reishi Extracts, LLC, a U.S. business offering Chaga Mushroom Extract and much more. For the research references to this article, go to the Siberian Chaga Extract page and click on any number indicating a reference.
