- Brightens dark spots and evens skin tone by inhibiting melanogenesis - Blocks the glycation process to minimize age-related skin yellowing and dullness - Boosts barrier function to reduce rednessCORRECT PCA Skin Vitamin b3 Brightening Serum  Reduce the appearance of dark spots and uneven skin tone while improving skin barrier function with this powerful skin-brightening serum. This advanced formulation effectively reduces skin discoloration, redness, and glycation related skin yellowing, leaving the complexion even and bright. Key Ingredients: - 6% Niacinamide: a potent, yet calming antioxidant that delivers multiple important benefits to the skin; it helps to reduce transepidermal water loss (TEWL) and improve barrier function for healthy, bright skin - Glycerin: a humectant and emollient that helps hydrate the skin - Mulberry Extract, Green Tea Extract, and Oligopeptide-51: an advanced ingredient blend that decreases the production of unwanted pigment to brighten skin and produce a clear, even complexion - Plankton Extract: an advanced ingredient derived from a biotechnologically balanced and standardized pool of microalgae actives that have been carefully selected and encapsulated in liposomes to brighten and even skin tone while dramatically reducing dark spots and discoloration Size: 7.1mlDirections: After cleansing, toning, and applying any PCA SKIN® treatment serums, apply to the entire face and neck for maximum skin brightening and anti-aging benefits. Follow with the appropriate PCA SKIN broad spectrum SPF product in the daytime and moisturizer in the evening.