This often gets asked in reference to this paper. The woman in this paper was taking around 10 grams Chaga per day which we do not recommend on any of our products without consulting your health practitioner. The paper does not say whether it was raw Chaga or an extract powder and it is also the only reported case we’ve come across.
Research data that we’ve seen in regards to oxalates and Chaga, shows anywhere from 2-10% oxalates.
Our preliminary testing shows our Chaga product to contain 2-3% oxalates equating to roughly 20-30mg per serving.
There are many foods that will have higher amounts of oxalates than Chaga on a per-serving basis. As an example, a bowl of cereal may have as much or more oxalates than a serving of Chaga. Another example is if you are a big spinach eater.
If you are on a low oxalate diet, you should discuss Chaga with your health practitioner prior to consumption.