The Ordinary Alpha Arbutin 2% + HA is a concentrated serum that combines purified alpha arbutin with hyaluronic acid to target uneven skin tone and hyperpigmentation. The formula contains a high 2% concentration of alpha arbutin for enhanced effectiveness in brightening the skin. Key features: • Contains 2% pure alpha arbutin for skin brightening • Includes hyaluronic acid for improved delivery and hydration • Water-based serum formula • Helps reduce appearance of dark spots • Targets uneven skin tone • pH-optimized formula for ingredient stability Alpha arbutin is sensitive to degradation in water-based formulas if not properly pH balanced. This product has been specifically formulated at an optimal pH level to maintain ingredient stability and effectiveness. The formula may experience natural color changes when exposed to sunlight or increased temperatures, but this does not affect its efficacy or safety. Can be used both morning and evening as part of a skincare routine.