Aromatherapy Natural Castor Oil is 2 in 1 oil for body and hair. Castor oil’s germicidal and disinfectant properties make it useful for treating certain skin conditions, particularly those caused by bacterial or fungal infections. Its properties also help to protect the hair and scalp from microbial and fungal infections, the two principal causes of hair loss. For those suffering from dandruff, the fatty acids in castor oil help nourish the hair and prevent the scalp from drying.