The Ordinary Alpha Arbutin: A skin treatment serum for excess melanin.Alpha Arbutin 2% + HA is a concentrated serum with purified Alpha Arbutin and Hyaluronic Acid for hyperpigmented skin by Deciem. Visibly improves skin prone to acne and hyperpigmentation. It is used at a higher concentration of 2% versus the standard 1% and is fortified with next generation hyaluronic acid for enhanced delivery. Much stronger than arbutin and beta arbutin. If the pH of the formulation is not ideal, it is very sensitive to degradation in the presence of water. This formula has a pH of 4.9, which we found to be the most suitable pH for minimizing the degradation of alpha arbutin. Made in Canada.