Salt as far as I know is the only mineral (non plant) spice we use, it's 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 https://en.wikipedia.org/wiki/Na%2B/K%2B-ATPase

I don't add salt in my food and avoid products with salt for more than a year, "heavy food" doesn't feel as heavy, my skin is not as dry as before and looks better and injuries seem to heal faster.