While consumption of this mushroom is safe, you can ingest too much. It is not recommended to take the powdered form for more than 30 days, because this form is very concentrated. There is also a link between powdered Reishi and liver damage. Some side effects of over-consuming the mushrooms include
As with any supplement, consult your primary care provider. Never stop taking prescription medicine without first consulting your doctor. Finally, avoid Reishi mushrooms if you have low blood pressure or thrombocytopenia.

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