Super Natural. Deep condition and repair hair with Egyptian Black Castor & Carrot Seed Hair Food Mask. Black castor from the Nile silt produces a superior black seed oil which stimulates hair with sulfur. The emollient, rich oil softens and protects hair decreasing breakage. Carrot seed oil feeds hair pro-vitamin A which encourages hair growth. Scroll down to read more. Size: 12 oz. extra_field_1 Feed your roots and watch hair sprout. That's right. With proper nutrition hair can be healthier, stronger and longer. Legend has it that black castor oil was first produced in ancient Egypt. By roasting seeds of the castor plant that grew along the Nile, a thick, viscous oil could be produced.