HealthAid Castroclean (Pure Castor Oil) 60 CAPSULES. This product contains pure castor oil, which is commonly used as a natural colon cleanser. Castor oil helps maintain a clean colon keeping you feeling fresh and revitalized. A healthy colon is a sign of overall well-being. Castroclean contains pure castor oil, which is commonly used as a natural colon cleanser. Castor oil helps maintain a clean colon keeping you feeling fresh and revitalized. A healthy colon is a sign of overall well-being. Gentle, but effective, Helps maintain a clean and healthy colon. Also known as Castor Bean and Palma Christi, Castor Oil has been used therapeutically in ancient India, China, Persia, Egypt, Africa, Greece, Rome, America and in 17th century.