10 Beauty Benefits and Uses of Castor Oil Published on Feb. 26, 2017 in 10 Beauty Benefits and Uses of Castor OilFull resolution (630 × 396) ← Previous Next → Why It Works:The presence of ricinoleic acid in castor oil makes them a perfect remedy for reducing the appearance of stretch marks. How To Use It: Mix the castor oil with a little almond oil and massage onto the area of stretch marks.