A.V. advised against consuming sodium, saying that its explosive. I personally avoid using salt, and have a strong aversion to salty foods in general. I think that salt may be even harmful in excess, especially for people on Low Carb.
I have a theory that Carbs tend to leach sodium from the body, this is why cooked starches tend to be served with liberal amounts of salt, many carb foods also have high potassium and so more salt is needed to balance it out. The sodium, potassium, and magnesium levels are closely connected, and when one is imbalanced it usually effects the others.
I believe sodium serves a vital function, but its best obtained within whole foods as part of a complete mineral matrix that is properly balanced with potassium, magnesium, and the other trace minerals. I will often sweat heavily and deplete my body salts, but even in my depleted state I will avoid using straight salt to replenish my sodium levels. I prefer to use foods.... Blood is my go to and as long as I have enough sheep blood I do not need any other form of salt....when Im out of blood I will use seaweed, or drink lemon water with raw eggs.
In extreme cases of dehydration, mineral depletion or muscle cramping I will eat raw clams, making sure to save and drink the juice.