View full article | Evidence for the Topical Application of Castor Oil: A Systematic Review Deborah A. Kennedy, MBA, ND,1,2,3 Dana Keaton, NMD, LAC4   Abstract Background: Castor oil has been used for centuries in medicinal and nonmedicinal applications. By far, the most common use is as a cathartic to treat constipation. However, castor oil has also […]