The Ordinary Caffeine Solution 5% + EGCG is a water-based serum that reduces the look of puffiness and dark circles in the eye contour. The formula works by combining a high concentration of caffeine with a highly-purified epigallocatechin gallatyl glucoside (EGCG). Independent studies have shown that topical use of each of caffeine and EGCG can help reduce looks of puffiness and of dark circles in the eye contour. Additional studies have shown that caffeine can also reduce the appearance of cellulite. Use after cleansing, before water-based serums, anhydrous serums, oils, suspensions or creams.