Active Serum Pure Mandelic Acid 15% Serum with a slightly oily texture, containing 15% mandelic acid, an alpha hydroxy acid that promotes gentle exfoliation. It improves the appearance of the skin, making it visibly smoother and more radiant, evens out the complexion and reduces fine lines. MODO USE Preferably use la sera on cleansed skin. Apply una a small amount of product to the face, avoiding the eye contour area, before cream. During the day apply una sunscreen. Do not use in the same routine in combination with other direct acids.