A lightweight hyaluronic acid serum that plumps and smooths skin and helps restore the look of facial volume and contour as skin ages.Its core is HYAsync, skinbetter's hyaluronic acid (a humectant that draws water into the skin) bonded to alpha-lipoic acid so the HA resists breaking down and stays active longer. Niacinamide (a form of vitamin B3) supports the skin barrier, while a peptide and squalane help skin look firmer and more hydrated. In skinbetter's 12-week study, most patients saw improvements in plumpness, texture, and radiance.Apply morning and night to clean skin, after cleansing and before heavier creams. It is well-tolerated, including on sensitive skin, and suited to wear alongside a retinoid. Finish your morning routine with SPF.Size: 30 mL Best for: skin showing volume loss, fine lines, and dullness; all skin types, including sensitive Use: AM and PM, after cleansing Pairs well with: retinoids, sunscreen Results: in skinbetter's 12-week trial most patients saw plumper, smoother, more radiant-looking skin; results build over the following weeks