La Roche Posay Pure Niacinamide 10 Serum is a dermatologically tested facial treatment that targets dark spots and uneven skin tone. Formulated with 10% niacinamide, 5% HEPES, and hyaluronic acid, this serum helps repair the skin barrier while providing gentle exfoliation and hydration. The serum contains a powerful combination of ingredients including 10% pure niacinamide that acts as a melanin blocker and anti-inflammatory agent, along with 5% HEPES for gentle exfoliation. It's suitable for all skin types including sensitive, oily and rosacea-prone skin. For best results, apply morning and/or evening before moisturizer and always use in conjunction with UV protection. Avoid direct contact with eyes. Clinical studies with 41 subjects have demonstrated its efficacy under dermatological control.