For skin:

Mustard oil has a firming, toning and stimulating action on the blood circulation which makes it an ally in case of withered skin. 

To use: Mix a few drops of mustard oil with another oil.

For hair:

Fine, dry and dull hair can count on the richness of the vegetable oil of Mustard to restore their tone and vitality. It rich in fat acid unsaturated. Your hair will be sheathed and nourished. Mustard oil is a perfect oil for curly, coily and kinky hair. It can be use if have hair loss and like anti dandruff. 

To use: Apply a lot with coconut oil or castor oil. Apply all over your hair with emphasis on lengths and tips and leave for 20-30 min.

For body:

Mustard oil has a slightly heating effect due to its composition in allyl isothiocyanate. It can therefore be used by athletes to prepare muscles for exercise. This heating effect is coupled with a toning effect on the blood circulation in particular. Its use in massage before or after the sport can be effective to warm up or relax the muscles. It can also be useful in case of rheumatic pain. 

To use: You can use like massage oil.