Eucerin Hyaluron-Filler Skin Refining Serum is an ultra-light serum that helps to reduce fine-lines and refine pores with 3x Effect, working to plump up the skin and protect against environmental aggressors. 1 Fill 2 Refine 3 Defend Containing key ingredients Hyaluronic Acid, Glycolic Acid and Lactic, the serum is suitable for skin showing first signs of ageing, including rough or dull skin, fine lines and enlarged pores. With an ultra light and non-greasy texture, the serum is also suitable for oily skin or for layering under makeup.