I have problems swallowing capsules. After playing ping pong with a few between my trachea and sinuses, I've opted for chewables as much as possible of late.
I checked out changa at the links below. Has zinc and copper for antiviral goodies and oxalates for baddies. One case, 72yo gal with liver cancer taking for six months ended up with kidney damage (4-5tsp/day x 6mo - is that a lot?). Blood thinner? (bleeding risk) Avoid if one has autoimmune disease. Kidney stones? It’s risk vs benefit, I guess?
https://draxe.com/nutrition/chaga-mushroom/
https://www.mskcc.org/cancer-care/integrative-medicine/herbs/chaga-mushroom