The Ordinary Alpha Arbutin 2% + HA is a water-based serum with alpha arbutin and hyaluronic acid. This treatment fades hyperpigmentation (such as dark spots, acne scars, age spots, and melasma) and promotes a clear, even complexion. With Alpha Arbutin, an ingredient shown to visibly and safely lighten skin and fade hyperpigmentation without irritation, With hyaluronic acid, supporting alpha arbutin delivery and providing a powerful hydrating and plumping effect. How to use: Apply a few drops to your face in the morning and evening before oils, moisturizers and creams.