numbuzin No.5+ Glutathione Vitamin Concentrated Serum, How to use * Apply 23 drops on clean, dry face * Use after toner, before moisturizer * Gently pat until absorbed * Use once daily (preferably at Numbuzin No.5 Vitamin Concentrated Serum Replying to @trooprix Numbuzin No. 5 Vitamin Concentrated Serum ingredient review by a beauty product developer. #numbuzin #numbuzinserum #numbuzinserum5 #numbuzinreview #numbuzin5 #vitaminserum See and compare the before and After .#numbuzin, Products used , Numbuzin No. 5 vitamin Niacinamide concentrated pad , Numbuzin No. 5 vitamin Boosting Essential Toner, Numbuzin No. 5 Glutathione numbuzin No.5+ Glutathione Vitamin Concentrated Face Serum Travel Size 1.01 fl oz: Dark Spot Reduction, Brightening, Contains Vitamin E & C : Target