The Red-belted conk looks intruiging Lars
The Reishi in prepared form - what is that used for?
It might be easier to do some Googling.
Like many Chinese Herbs, Reishi is highly thought of by some, but for others they don't think there's sufficient Western Research to confirm identifiable actions or benefits.
Even though you can buy it in many shops, it's usually best initially sought via a qualified Chinese herbalist (there are plenty of Westerners who've now qualified).
They can check your current health & any contraindications.