The Difference Between Salt and Sodium

Sodium is one of the principle ions in the body, existing in the fluid outside the cells (extracellular fluid) and which plays a critical role in many bodily mechanisms. According to the Linus Pauling Institute, of Oregon State University, there are three main functions of proper sodium levels in the body: first, it contributes to the maintenance of electrolytes across cell membranes; second, it plays an important role in the absorption and transportation of certain nutrients and water in the small intestine; finally, it contributes to the regulation of blood volume and blood pressure. Salt, on the other hand, is a combination of the minerals sodium and chloride, containing usually 40% sodium and 60% chloride.