https://nootropicsdepot.com/red-reishi-mushroom-ultra-concentrated-extract-capsules-9/

I believe this is the one Lorus referenced. I would look at reviews for the one you are looking at.
Amazon.com: Micro Ingredients Sustainably US Grown, Organic Reishi Mushroom Powder, 8 Ounce, Pure Reishi Supplement 100:1 Extract (Reishi Mushroom) : Health & Household