Many websites claim that chaga was used for over 4500 years. However, people didn’t do much writing back then, so it’s pretty hard to verify that claim.
Maybe it’s true, but no one knows for sure. The first verifiable mentions of chaga mushrooms date back to the 16th century, stemming from Russia. Back in those times, chaga was combined with other herbs and used to treat gastritis and gastric and duodenal ulcers. It was also used to treat intestinal pains and upset stomach. In the past and in recent times a decoction made from chaga is especially popular among foresters, who use it to alleviate hunger, remove tiredness, and increase work capacity.
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