Mustard seeds are sourced from either the black mustard plant, the white or yellow mustard plant or the brown Indian mustard. Prepared mustard is made when mustard seeds are ground and mixed with liquids like vinegar or water. It is widely used as a condiment. Mustard seeds contain lots of minerals, vitamins, as well as essential oils.
Store mustard seeds in an airtight container and look out for the manufacturing and expiry dates when you buy.