This seed comes from the ground and has a spicy flavor. Native to the temperate areas of Europe, mustard helps reduce pain, stimulates appetite and relieves symptoms of arthritis. According to a study done by the American Journal of Clinical Nutrition, including mustard oil in your regular diet could prove to be beneficial to your heart health. Being a rich source of MUFA, it lowers bad cholesterol in the body, thus keeping a check on blood fat levels and helping in circulation. It can help control symptoms of asthma, packed with B-complex vitamins and help to relieves rheumatoid, arthritic and muscle pain.