Salt as far as I know is the only mineral (non plant) spice we use, it's only purpose is to enhance taste.
There is a common confusion between salt (sodium chloride) and sodium, many falsely believing salt is not used only for taste but it's essential for health.
Sodium is a vital element that is found in almost all plants and animals and there is no need for an extra sodium intake because our food has plenty.
Sodium and potassium balance in the body is essential for cell physiology and our health