Kate is said to swear by [Karin Herzog Oxygen Face Cream, Mild Scrub and Professional Cleanser pack](http://www.karinherzog.com.au/products/kate-s-favourites-oxygen-face-mild-scrub-and-free-professional-cleansing-cream|target="_blank"|rel="nofollow"), $190, having used this Swiss beauty range [for years](http://www.aol.com/article/2015/01/07/kate-middletons-glowing-skin-beauty-secrets/20843683/|target="_blank"|rel="nofollow").