This year, Sharadiya Navratri will begin on October 17. Nine different forms of Durga Maa are worshiped in this festival lasting nine days. In such a situation, many people keep a vow to get the blessings of Mother Rani. If eating fast, potato, radish, kattu and water chestnut flour are used in it. But if we talk about salt, rock salt is eaten instead of ordinary. But do you know why rock salt is used during the fast? So let us tell you about this and the benefits of eating rock salt.