This page is available here: http://www.saltinstitute.org/53.html
Excerpt:
Human dietary consumption is a major market for salt.
Salt serves many purposes. Humans and other animals have an inherent taste ( 1 2 3 ) for this essential nutrient. Salt is the world's oldest known food additive. People use many types of sodium chloride in food processing, cooking or at the table -- at home or in restaurants. Each makes its unique contribution.