Black Salt / Bit Lobon is a pungent smelling smelling purple-ish/ pinkish grey rock salt. It is vastly used in chaats, raita, borhani, chotpoti, fuska, chat masala and on deep fried snacks.
Black Salt / Bit Lobon is considered as the best form of salt in ayurvedic medicine because it does not increase sodium content of blood. It also helps aiding digestion and heart burn.