Is it true that common salt act as a preservative?
 

Salt has been used for centuries to preserve food by inhibiting the growth of bacteria, fungi, and other microorganisms. When salt is added to food, it creates a hypertonic environment that causes water to move out of the cells of the microorganisms, leading to their dehydration and death. This makes it more difficult for bacteria to multiply, which in turn helps to preserve the food. Salt is commonly used to preserve meats, fish, and vegetables, among other foods. However, it's important to note that excessive consumption of salt can lead to health problems such as high blood pressure, so it's essential to use it in moderation.