Our supply screened by Sensible Gene for safety and purity. This mushroom has a variety of potential health benefits, including boosting the immune system and fighting cancer. Recent research is focussed on its use for Atopic dermatitis- skin allergy. See link below for proper use and  side effects.
https://www.healthline.com/nutrition/reishi-mushroom-benefits
https://medicalxpress.com/news/2020-10-efficacies-ganoderma-lucidum-treatment-skin.html