The Ordinary Caffeine Solution 5% + EGCG is a water-based eye serum that primarily targets visible skin concerns around the eye contour. This formula contains a high concentration of caffeine alongside Epigallocatechin Gallatyl Glucoside (EGCG) which is derived from green tea leaves. This combination of active ingredients works in synergy to reduce the appearance of visible dark circles and puffiness around the contour. Notes: 1. Hollowness in the eye contour as a result of the structure of sub-dermal tissues like fat and bone can result in visible shadows under the eyes. This shadow, which is not to be mistaken for dark circles, cannot be addressed with topical skincare including this formula. 2. Fat deposits under the eye contour can create permanent puffiness in this area. This type of deposit cannot be improved with topical skincare, including this formula. 3. Supplied in UV-protective packaging as EGCG is sensitive to light.