Saltiness is a basic taste sensation that is primarily detected by taste buds on the tongue. It is caused by the presence of sodium ions, which are commonly found in table salt, or sodium chloride. Saltiness can enhance the flavor of foods and is often used in cooking and food preservation. In nature, saltiness is an important characteristic of seawater and many foods, such as olives and pickles. The human body requires a certain amount of salt for essential functions, including maintaining fluid balance and nerve transmission. However, excessive salt intake can lead to health issues like high blood pressure.