The primary nutrient found in table salt is sodium. Chemically known as sodium chloride (NaCl), table salt is essential for maintaining proper fluid balance and nerve function in the human body. Sodium plays a key role in various physiological processes, including muscle contraction and the transmission of nerve impulses. While it's vital for health, excessive sodium intake can lead to health issues such as hypertension and cardiovascular diseases. In moderation, however, sodium is crucial for metabolic functions, and iodized salt is often fortified with iodine to prevent deficiencies.