AHA is an abbreviation of Alpha Hydroxy Acid. Many AHAs are known as Fruit Acids. The complex used in Eucerin Hyaluron-Filler Night Peeling & Serum combines three different acids – Glycolic Acid, Lactic Acid and Gluconolactone (a Polyhydroxy Acid). Lactic Acid is skin’s own Natural Moisturizing factor and all three are clinically and dermatologically proven to gently but effectively exfoliate skin and stimulate cell renewal. Gluconolactone also supports the matrix around skin collagen, protects against collagen degradation and helps skin to maintain its elasticity.

Lactic Acid (also known as Lactate) is part of skin’s Natural Moisturising Factor (NMF) and a key component of skin’s protective acid mantle which regulates the pH value of skin. It absorbs and retains moisture within the outermost layer of the skin and so plays a vital role in skin condition. It is also comedolytic.

Glycolic Acid is a very common chemical peel used by many dermatologists. It is an Alpha-Hydroxy Acid (AHA) or sugarcane derivative with an extremely small molecular size. It works by removing dead skin cells to even skin texture. The concentration of Glycolic Acid used in the Skin Refining Serum is a lower concentration than what is used in dermatological treatments for softer effects.