1. In a double boiler, heat 1/2 cup of extra virgin olive oil with 3 sprigs of rosemary on low for about 30 minutes.
2. Let the rosemary steep in the oil overnight.
3. Strain the oil the next day.
4. Add 3 tablespoons of black seed oil and 3 tablespoons of castor oil to the strained oil.
5. Mix well and store the serum in a dropper bottle for up to a month.

How to use:

• Apply the serum generously to your scalp once a week. Leave it on for 30 minutes up to 3 hours.
• Rinse your hair well with shampoo.
• Tip: To avoid greasy hair even after shampooing, apply flour to your hair before rinsing off. The flour will help absorb some of the oil.