The only thing dangerous about salt is table salt that is bleached and has chemicals added. If you can get good salts like himalayan pink salt and celtic sea salt, you are in the money.
Salt is the most efficient nutrient for the body. Provides essential minerals as well as a sleuth of other positive health properties.
edit: Pink salt is not pink because more chemicals were added.
Check out this link: http://healthwyze.org/index.php/component/content/article/11...
The more common "refined" table salts have been been stripped of their minerals during processing, which manufacturers then sell to supplement companies. It makes the unmistakable point that the producers of table salts are intentionally stripping what they know to be the most nutritious part of the salt, and actually increasing profits by malnourishing their own customers.