Castor oil can be used as a natural remedy for occasional constipation. Castor oil is rich in ricinoleic acid, a monounsaturated fatty acid. These types of fats act as humectants and can be used to moisturize the skin. So castor oil can help lock moisture in the skin. Castor oil helps heal wounds by stimulating the growth of new tissue, reducing dryness and preventing the buildup of dead skin cells. Castor oil is high in ricinoleic acid, a fatty acid that has been shown to help reduce pain and inflammation.