Salt is essential for life (we couldn’t agree more) and as the body can’t produce it itself, has to be provided in small white boxes (or similar). Without it, our bodies become chemically unbalanced, our muscles and nervous system cease to function and eventually we die. We die eventually anyway of course, but salt keeps us going for a bit longer.
All our body fluids are salty. Blood, sweat, tears, saliva and the general consensus among experts is that a healthy adult should aim towards a daily intake of five or six grams of salt to maintain a good balance.