I think i made my too strong. 1c root 4c water. The taste is A+ but by the end of my last shell, I had this splitting headache, I waited an hour for it to go away but it didn't and popped an advil.
Now, this probably was my set and setting, I wasn't really in a good mood and I was in a bright environment. Some time in the future I'll try 2tbs per cup in a more darken setting.