I have read on ECF of a ground black pepper extract made with PGA that can add throat hit. I have not tried making any as I use a high mg nic base and my throat hit is more than satifactory. I believe that it was made in a 1 to 4 ratio of pepper to PGA. It was allowed to steep and then run through a coffee filter to remove the pepper. Claims were made that it did not induce a pepper flavor, but I don't see how that could be. And maybe the throat hit came from just the PGA?