Infused with rosemary. For hair and skin. Seals moisture. Nourishes & revitalizes. Strengthens & conditions. Tropical Roots Jamaican Black Castor Oil is a powerful hair and skin oil. It is infused with a growth complex that strengthens and revitalizes damaged hair. Tropical Roots Jamaican Black Castor Oil penetrates the roots to seal in moisture and thicken the hair shaft. It is also beneficial for the skin's appearance.