Formula is gentle, effective, and safe for all skin types. Concentrations of more than 5% can cause skin irritation.. BRIGHTENS & CLARIFIES SKIN - Transform troubled skin and reveal your natural beauty. Our niacinamide toner is infused with zinc and magnesium. Use for dark spots, age spots, hyperpigmentation treatment, skin discoloration, blotchy tones, redness, and uneven skin tone.. SLOWS DOWN SIGNS OF AGING - Our anything-but-ordinary niacinamide helps reduce the appearance of fine lines and wrinkles near the eyes, mouth, and forehead, leaving skin with a satin-smooth, hydrated finish that looks plumped from within.. DERMATOLOGIST & ALLERGY TESTED - Advanced Clinicals niacinamide face serum relies on high quality, ethical ingredient sourcing. Our cruelty-free formula is made in the US in a federally audited lab and undergoes a strict quality assurance process.. Results are visible within a few days and take full effect in 4-6 weeks.