Sodium is essential for life, so you could say sodium prevents death. As always, the poison is in the dose. And, as already mentioned, drinking too much water

Sodium is essential for life, so you could say sodium prevents death. As always, the poison is in the dose. And, as already mentioned, drinking too much water and not consuming enough sodium leads to hyponatremia. Patients are always surprised when I tell them they're sick from too much water and not enough salt.