The Ordinary AHA 30% + BHA 2% Peeling solution is a water based deeply exfoliating facial serum developed to combat dullness, uneven skin tone and textural irregularities. It contains the righteous combination of exfoliants AHA 30% (alpha hydroxy acid), BHA 2% (beta hydroxy acid) along with glycolic acid, salicylic acid, lactic Acid, tartaric Acid, citric Acid, Sodium Hyaluronate Cross polymer and Tasmania Lanceolata fruit/leaf Extract with optimal pH that deeply exfoliates multiple layers of the skin for a brighter, more even appearance. This at-home peel helps to clear pore congestion and improve uneven pigmentation. The formula is further supported with a cross polymer form of hyaluronic acid hydrate and leaves skin feeling calm and comfortable, pro-vitamin B5 for hydration, and black carrot for added protection. This water-based serum is fortified with Tasmanian Pepper berry extract which helps to reduce irritation and sensitivity that is often associated with exfoliation due to acid use. The pH of this formula is approximately 3.6. Glycolic Acid, the primary AHA used in the formula, has a pKa of 3.6 and pKa is the most important aspect to consider in formulating with acids. pKa implies acid availability. When pKa is close to pH, there is an ideal balance between salt and acidity, maximizing the effectiveness of the acid and reducing skin discomfort.