Everyone is different.We don't need salt. There is already too much salt in everything we eat. Unprocessed meat and fish already have all the salt we need. We'd need salt only if we ate a goat's or a horse's diet.
Grey salt is still 99% salt so it's not an excuse to use more of it.
Last but not least, we don't need carbs. We need fats and protein. There are essential amino acids, essential fats, but there is no such thing as essential carbs. Inuits and keto diets are a proof that we don't need carbs to live a healthy life.
Some People with long covid have found they need more electrolytes, including what's in salt. Same with low BP