Castor OilCastor Oil (Ricinus Communis) Castor Oil  oil is well known for its ability to fade dark spots, whether acne spots or age spots, lessen skin tags, and even to dissolve cysts. This is a viscous oil with a high fat content, which is absorbed by the skin very slowly. Despite this it is entirely non-comodogenic and as it draws dirt to itself, it is an excellent addition in any cleansing products.