SO Extra Strength Jamaican Black Castor Oil is 100% Pure and is our natural Hair & Skin Rejuvenator. Celebrated for its restorative properties, Jamaican Black Castor Oil has been used for centuries as an all-purpose healing oil thanks to its antioxidant and soothing properties. Our JBCO is extracted from castor seeds (Ricinus Communis) and roasted in the tradition which Jamaicans have used over generations. The seeds are roasted longer, producing nutrient-filled ash, resulting in a darker color and higher potency. This also impacts the oil's pH balance, making it more alkaline and therefore much healthier and more effective on skin and hair.