Apply 2–3 drops to clean, dry skin in the morning and evening. Layer with other serums as needed.Explore our other concentrated facial serums like our 5% Niacinamide serum and 9.8% Glycolic Acid serum. Try out our Hyaluronic Acid serum skin hacks below: Add a drop of our Hyaluronic Acid serum to your liquid makeup (foundation or highlighter) to add a boost of hydration/sheer out the coverage to a tint. Layer our Hyaluronic Acid serum underneath your favorite eye cream for an extra hydration boost. Use our Hyaluronic Acid serum as a highlighter by dabbing extra over your moisturizer on the "C" between the top of your brow arch, temple, and cheek bone. Zone treat your face by applying Hyaluronic Acid serum all over to hydrate skin. Follow with your favorite moisturizer where needed. Layer with our Niacinamide serum to reduce oil & sooth skin. Layer with our Glycolic Acid serum to gently exfoliate & improve texture.