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Why is salt used in foods?

There is enough salt naturally present in food to satisfy our daily 1 g need. However, salt is sometimes added during processing or cooking of food, and is also often sprinkled on a meal by consumers to enhance and improve the taste and flavour. Bread, tomatoes, boiled eggs do not taste good enough for many people unless salt is added. It is also used to preserve some foods. Salt curing is one of the earliest known forms of food preservation.