Mary Kay Clinical Solutions® Ferulic + Niacinamide Brightener .5 fl. oz. New in original Box Reduce uneven skin tone, and boost your skin’s brightness with this targeted booster. Address multiple causes of discoloration with a trifecta of potent, powerhouse ingredients. Help defend against external factors that may lead to skin discoloration (hyperpigmentation and sun spots) by using a formula packed with dermocosmetic ingredients.