ARNICA (Arnica Montana) is a natural ingredient that reduces discolouration from bruises, and is now used in eye creams and treatments of several cosmetics companies, including Jurlique. Jurlique sells an Arnica cream for about $25, but you can also pick up a tube of Arnica gel or cream (Boiron) at Whole Foods, etc for about $5. I've found that my dark circles have lightened up quite a bit since I started using Arnica.