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). This product is vegan, cruelty-free, and formulated without oil, alcohol, silicone, nuts, gluten, and fragrance.