Castor oilís high concentration of unsaturated fatty acids is believed to be the reason for its remarkable health benefits. Even though it has an unpleasant, nauseating taste, it is widely used to treat minor and major illnesses. Castor oil is a remedy for more serious health conditions, which include: Labor Induction ñ Castor oil is used to induce labor in pregnant women. Note to seek consultation with your doctor first before ingesting the oil as it may bring potential side effects to the mother and to the baby. Arthritis ñ Castor oil acts as a natural remedy for arthritis. Because of its anti-inflammatory properties, it helps massage arthritic joints and sore, tired muscles. Tumors ñ By placing a castor oil pack (a piece of flannel soaked in castor oil) over a tumor, it can help reduce the appearance of tumors in your body.