Strengthening Mustard seeds, which mustard oil comes from, contain calcium, protein, vitamins A and E, alpha omega-3 and alpha omega-6 fatty acids. They also contain antioxidants; these components make mustard oil an effective hair growth agent. The vitamins ensure strong hair and prevent hair from falling out. Conditioning Because mustard oil contains fatty acids, it both conditions and makes hair stronger, which causes healthy hair growth. Growth Mustard oil encourages the circulation of blood. Mustard oil is a hair stimulant, meaning it causes hair to grow healthier at a faster rate. How to Benefit From Mustard Oil Massage mustard oil onto your hair and your scalp three or more times a week. Each time, leave the oil in your hair for at least three hours before rinsing it out with shampoo. You will have healthier, stronger, faster-growing hair in just a few weeks. Tips To benefit from mustard oil, you have to keep using it. Mustard oil along won't guarantee healthy hair growth because a proper diet and exercise are also integral. Make sure you are not allergic to mustard oil before you use it. If irritation occurs, discontinue use.