No.5 Vitamin Concentrated Serum

It combines niacinamide (around 5%), a stable vitamin C derivative (3-O-ethyl ascorbic acid), and a small dose of glutathione to brighten, even out tone, and soften the look of dark spots and post-blemish marks, while the niacinamide also helps refine texture and support the barrier. The texture is thin and fast-absorbing, so it sits comfortably under other layers. Smooth a few drops onto clean skin after your toner or essence, morning and evening. During the day, follow with sunscreen, since brightening actives make daily SPF worthwhile. These ingredients are usually well tolerated, but patch test and ease in if your skin runs sensitive.