Louis Widmer AHA-Concept AHA 5% Peeling Cream is a product of very effective treatment that is suitable for all skin types, especially oily skin. It is formulated with AHA acids (alpha-hydroxy acids) from natural and synthetic raw materials which stimulate cell renewal and enhance skin moisturisation. The thickened layer of aging skin is exfoliated and the skin is able to retain more moisture. This improves the skin's suppleness and even appearance.