Advanced Clinicals Niacinamide Serum is a popular skincare product featuring 5% Niacinamide (Vitamin B3) to brighten, smooth pores, even skin tone, and reduce redness, while also hydrating with Hyaluronic Acid and calming with Aloe Vera for a clearer, more radiant complexion, suitable for most skin types and used by applying a few drops to clean skin before moisturizing.