Saline, commonly known as salt, is a mineral composed primarily of sodium chloride (NaCl). It is essential for various biological functions, including maintaining fluid balance and transmitting nerve impulses in the human body. Salt is naturally found in seawater and can also be mined from salt deposits. In addition to its biological importance, saline is widely used in food preservation and flavoring. It helps inhibit the growth of bacteria, making it a key ingredient in methods like pickling. Saline solutions are also used in medical settings for hydration and cleaning wounds, showcasing its versatility in both culinary and health applications.