Byodo Premium Dijon Mustard is made exclusively from water, vinegar, sea salt, and brown mustard seeds. The casings of the mustard seeds are carefully removed before processing, which results in a mustard with a unique, delicately piquant flavor. This method of making mustard is called the Dijon method . In Medieval times, mustard was known to assist the digestion of rich foods. Mustard promotes the production of saliva and digestive gastric juices. The essential oils in mustard have proven antibacterial and digestion enhancing properties The addition of thickening agents, preservatives, or flavours is not necessary. Mustard's sharp, spicy taste comes from the essential mustard oils present, in bound form, within the mustard seed.