Mustard essential oil is a very strong stimulant, just like mustard oil. It is particularly effective in stimulating circulation, digestion and excretion. This oil, if used externally for the purpose of massage, stimulates circulation very well. The effects are very obvious by the red color of the skin. It also stimulates digestion by stimulating the secretion of gastric juices and bile from the spleen and liver. The excretory system is also stimulated by this oil since the peristaltic motion of the intestines is activated, benefiting digestion.
In west bengal we use mustard oil. It is very famous there, but here in Chennai the flavour is different. My wife likes it. I think we will buy it next time.