Salt deprivation can make a high concentration of salt appetitive, demonstrating modulation of taste by internal state.

“Salt is very appetitive at low concentrations and that's because we need it. It's our electrolyte balance requires salt. Every one of their neurons uses salt as the most important of the ions, you know, with potassium to ensure that you can transfer these electrical signals within and between neurons. But at high concentrations, let's say ocean water is incredibly aversive. And we all know this because we gone to the ocean and then when you get it in your mouth, it's not that great.”