eli5: If vitamins are things considered essential to human life, why is salt not considered a vitamin?

Question

Salt isn’t regularly considered a spice, nor is it discussed as a vitamin like A, B, etc. But isn’t it necessary in small amounts for humans?

In: 402

Answer 1

Salt is a spice. Also we do have a required amount, but (from memory) Bill Bryson said we get around 40x the required amount daily.