I have no experience doing that. To enhance the flavor of coffee, a combination of various minerals, including sulfur, is required. We learn that 14 nutrients (N, P, K...) are needed for crop cultivation. However, when analyzing crops, 60 types are discovered. This makes it possible to infer that nutrients that have not yet been scientifically identified may play a role. I recommend sea salt. Here, after Na and Cl, sulfur is contained in the most amount.
