What amount of salt would cause substantial damage to health? Does this mean that it is best not to use any salt at all?

Salt is sometimes known as "white death" due to the belief that an excess intake of salt can cause substantial damage to health.

What evidence exists to support or contradict the idea that excess salt intake can cause substantial health damage? Is it better to avoid salt altogether?

What amount of salt would really make substantial damage to health? Does it mean that it is the best not to use salt at all?

What amount of salt would cause substantial damage to health? Does this mean that it is best not to use any salt at all?