Salt has been a popular condiment for most of human history. Ancient Egyptians used it as a part of their religious offerings and the Ancient Greeks used it as currency. As for table salt, it is one of the most common household chemicals – Without it food doesn’t taste that good! Besides, it is typically mined from underground salt deposits, and is highly refined and finely ground, with impurities removed in the process. Table salt is made up of a little less than 40% sodium by weight, so a 6 g serving contains about 2,300 mg of sodium. Sodium serves a vital purpose in the human body as it helps nerves and muscles to function correctly, and it is one factor involved in the osmotic regulation of water content in body organs.