There is a huge difference to me in taste between the iron oxide salts, the "lava" (charcoal) salts and regular sea salt. I've always had a really sensitive pallet though. However, to my understanding, you wouldn't add these salts to change the flavor of food in which you add salt as an ingredient. Instead you sprinkle the crystals over meat, desserts, and other small portioned foods to get the color and a specific flavor on surface bites.