Black castor oil is said to have originated in ancient Egypt. Considering all of the herbal beauty concoctions and medicinal topical preparations, this is not very hard to believe. Unlike black castor oil from Jamaica and other such regions, our cold pressed black castor oil is never boiled. It is produced by roasting castor beans to produce sulfur. The beans are then screw pressed to extract the nutrient oil. The sulfur produced in the oil enhances castor oil's growth stimulating power. Egyptian black castor oil is the key ingredient for this Boost & Grow clarifying shampoo. Cold pressed Egyptian carrot seed oil is added to this formula to nourish roots and protect hair. Amla, Indian gooseberry, provides hair strength and reduces falling. Rosemary essential oil is added to this formula to clarify hair and further stimulate growth.