Isdin Acniben 2 - Night Concentrate Anti-Blemish 27 ML: Restore radiance to oily and acne-prone skin with Acniben® Night Concentrate Anti-Blemish. Its powerful formula, featuring retinaldehyde, zinc PCA, and niacinamide, helps diminish and prevent pimples, blackheads, and residual acne scarring. Key Components Zinc Niacinamide Ascorbic Acid Indication Acne scars Pimples How to use Can be use every night all over the face, on clean and dry skin. Gently massage until product is fully absorbed. Shake before each use.