👉 A casters, or a castor oil, is a type of oil that is commonly used in many cultures for its cleansing and moisturizing properties. It is obtained from the castor bean plant and contains a compound called oleocanthal which has been shown to have anti-inflammatory and antioxidant effects. Casters are often used as an alternative to traditional ointments or creams, especially in areas where there is sensitivity or irritation.