Paula’s Choice 10% Niacinamide Booster. SkinCeuticals Metacell Renewal B3 . You're meant to wear this underneath your regular moisturizer, morning and night. Featuring a who’s who of powerful dark spot correctors, including kojic acid, tranexamic acid and niacinamide, Discoloration Defense will have your skin looking brighter and more even toned in as little as 2 weeks. SHOP IT: Paula’s Choice, $44. At night, layer with other treatment products as needed and follow with moisturizer; during the day, finish with a sunscreen rated SPF 30 or greater. Dr. Dennis … 10% NIACINAMIDE BOOSTER. Peter Thomas Roth PRO Strength Niacinamide Discoloration Treatment. SHOP IT: Sephora, $166. 15% brightening complex - niacinamide, tranexamic acid, alpha arbutin, kojic acid, pentapeptide. 1.7 oz/50 mL. Pro Strength Niacinamide Discoloration Treatment An intensive formula that works to reduce the look of skin discoloration with a high-potency 15 percent active brightening complex. PRO Strength Niacinamide Discoloration Treatment. To be used twice daily for maximum results, simply apply 3 – 5 drops of the serum to the face, or you can mix it with your other skin care treatments. Peter Thomas Roth PRO Strength Niacinamide Discoloration Treatment. SHOP IT: Dermstore, $112. SkinCeuticals Metacell Renewal B3 . It's powered by a 15 percent brightening complex that includes niacinamide, tranexamic acid, kojic acid and alpha-arbutin. Shop Now. Peter Thomas Roth Pro Strength Niacinamide Discoloration Treatment is a lightweight cream that treats dark spots, post-acne marks and dull, uneven skin. Apply a few drops of Niacinamide 20% once or twice daily after cleansing, toning, and exfoliating. $88.00 . Peter Thomas Roth PRO Strength Niacinamide Discoloration Treatment is free from SkinCarisma flagged Allergens Understanding the Identified Contact Allergens The EU's Scientific Committee on Consumer Safety (SCCS) has identified and established 26 cosmetic ingredients that are likely contact allergens (potential to cause skin allergies) as demonstrated in clinical or epidemiological studies.