First of all, SALT IS NOT REMOVED FROM BUTTER. It is either added or not added. Unsalted and Salted are not always priced that differently. It depends on the market conditions, locale, etc. Many “gourmet” recipes and chefs use unsalted butter in their recipes and perhaps retailers feel they can charge more for the item because of its “novelty” factor. Many people just buy it because they can more conveniently control their sodium consumption. The composition of butter is: fat (80 – 82%), water (15.6 – 17.6%), salt (about 1.2%) as well as protein, calcium and phosphorous (about 1.2%). Butter also contains fat-soluble vitamins A, D and E.