Black Salt also called Kala namak is appreciated by some vegans in dishes that mimic the taste of eggs.
It is used, for example, to season tofu or avocado to mimic an egg salad or deviled eggs.
Black salt is considered a cooling spice in Ayurveda and is used as a laxative and digestive aid.
It is also believed to relieve flatulence and heartburn.
This salt is also used to treat hysteria and for making toothpastes by combining it with other mineral and plant ingredients.