Another benefit from putting salt in your coffee is that it helps you to stay hydrated. When we sweat the first thing that depletes in our body is salt! And it's an essential mineral to the bodies natural functioning and to hydration. But coffee is a diuretic which means that it causes your body to release a lot of it's water content within approximately 45 minutes of consuming. And with that water it flushes out a lot of it's minerals, like salt. So it literally dehydrates the body. So by adding salt to your coffee your giving the body back a lot of the salt that it will lose from drinking the coffee, which helps to counteract dehydration. Another thing that can help with dehydration after drinking coffee is to ensure that you drink lots of water within 45 minutes of having a coffee :)