Table salt and sea salt differ in source, processing and appearance. Table salt is harvested from underground salt mines, while sea salt is harvested from evaporated seawater or saltwater lakes.
Treated with chemicals that eliminate impurities and unwanted elements, table salt contains anti-caking agents and iodides to prevent clumping and increase iodine levels. Sea salt, evaporated by solar power or other fuel sources, retains trace minerals and elements, including iodine, due to minimal processing.
Table salt has white, fine-grained crystals similar to table sugar. Sea salt, which varies in color based on exact mineral content, has a coarse texture with larger pieces. Though both salts contain similar sodium content by weight, sea salt is often promoted as the healthier salt because of the mineral content.