Birch mushrooms have no side effects when ingested in moderation, and large amounts may cause abdominal pain, diarrhea, and other indigestion symptoms. Birch mushrooms are a kind of fungus in the alpine region, just like the usual fungus, shiitake mushrooms and enoki mushrooms, which is a kind of fungus that attaches itself to the decaying birch trees all year round, and its life cycle is very short, about only three months or so. Birch mushrooms have a charred black charcoal appearance and are rich in nutritional value, containing a variety of biologically active ingredients, such as a variety of oxidized triterpenoids, polyalcohols and other plant compounds. Its superoxide dismutase enzyme and SOD are 55 times more than that of Ganoderma lucidum and 23 times more than that of Brazilian mushroom, which has high nutritional value. However, its active ingredient content is limited and cannot be used for treatment and prevention of diseases. Birch mushroom has no side effects when ingested in moderation, but no food should be consumed in excess, and overconsumption of birch mushroom can easily lead to abdominal pain, diarrhea and other indigestion symptoms.