Andrew Huberman· PhD
Well, we also have salt sensors at various locations throughout our digestive tract, although the sensation and the taste of salt actually exerts a very robust effect on certain areas of the brain that can either make us crave more or sate, meaning fulfill, our desire for salt, and you can imagine why this would be important. Your brain actually has to register whether or not you're bringing in salt in order to know whether or not you are going to crave salt more or not