You can use mustard oil as a standalone ingredient in hair care by simply massaging it on the scalp to improve the circulation . Massage well and cover your hair with a shower cap. Wash normally after 30 minutes and use a mild shampoo and conditioner . Test-tube studies show that mustard essential oil may help decrease the growth of certain types of fungi and bacteria. Mustard oil is sometimes used to promote skin and hair health. However, most available evidence on the benefits of mustard oil for the hair and skin is purely anecdotal. One animal study found that mustard oil may help decrease pain by desensitizing certain pain receptors in the body. Mustard oil also contains ALA, an omega-3 fatty acid that may help decrease inflammation and pain. Test-tube and animal studies show that mustard oil and its components may help decrease the growth and spread of certain types of cancer cells. Although evidence is mixed, mustard oil is high in monounsaturated fatty acids, which may red...