Mustard seeds are the small round seeds of various mustard plants. The seeds are usually about 100 to 2 millimetres in diameter and may be coloured from yellowish white to black. They are an important spice in many regional foods and may come from one of three different plants: black mustard (Brassica nigra), brown Indian mustard (Brassica juncea) or white/yellow mustard (Brassica hirta).These are used as a spice in Pakistan, Northern India, Nepal, and Bangladesh.These black mustard seeds have been highly prized both as a medicinal as well as culinary spice for many years. The earliest reference to mustard dates back to 500 BC in early writings from India. They are commonly called called Sarson, Mohari in India. In foods, black mustard leaves (greens) are used in salads and other dishes. As per Ayurveda Black mustard is more potent & effective in improving appetite. Ayurveda mentions Black mustard use to get relief from germs under skin & Intestine. Black Mustard seeds are known to give relief from the number of migraine attacks you get. Black mustard seed is said to be useful for causing vomiting, relieving water retention (edema) by increasing urine production. Black mustard supports digestive system & help increasing appetite. Sarso or Mohri is rich in Protein, omega 3 oil & minerals which helps body getting adequate nourishment & in general wellbeing. Some people make a paste by mixing ground black mustard seed with warm water.