It is generally safe and beneficial to use Hyaluronic Acid products every day. Hyaluronic Acid is a humectant, meaning it helps the skin retain moisture. Using Hyaluronic Acid regularly may help improve skin hydration, reduce the appearance of fine lines and wrinkles and support overall skin health. If you have oily skin, you may not need to use Hyaluronic Acid as frequently as someone with dry skin. If you have sensitive skin, start with less frequent use and gradually increase as tolerated. Apply Hyaluronic Acid Serum to clean damp skin and follow up with a moisturizer to seal in hydration.