Morning, Step 4: Tarte Sea Mermaid Skin Hyaluronic H2O Serum I'd heard the hype about hyaluronic acid and was excited to try this Tarte Sea Mermaid Skin Hyaluronic Acid H2O Serum ($42) when it arrived in my quarterly POPSUGAR Must Have Box. My skin immediately absorbs this serum, locking in moisture without making me feel oily. Here are some great drugstore finds with hyaluronic acid. Image Source: sephora.com Tarte Sea Mermaid Skin Hyaluronic Acid H2O Serum $42 from sephora.com Buy Now