Chaga
Inonotus obliquus
Chaga (Inonotus obliquus) is a dark, charcoal-like fungal growth (technically a sclerotium, not a typical mushroom cap) found on birch trees in cold climates.
Last reviewed August 3, 2026
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Is Chaga safe to use?
Contains oxalates, which may contribute to kidney stone formation in susceptible individuals — use caution or avoid if you have a history of kidney stones or kidney disease. May interact with blood-thinning and diabetes medications — consult a healthcare provider before use if taking either. Discontinue before scheduled surgery. Avoid during pregnancy and nursing pending more safety data.
This is educational information, not medical advice. See our full Disclaimer before use.
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Used in rituals & traditions
The symbolic and spiritual side of Chaga is kept in the Cauldron:
- Planetary & elemental correspondence
- Folklore & spiritual associations