The Niacinamide 15 Serum

Niacinamide at 15% works to even out tone and post-blemish discoloration, support the skin barrier, and manage shine, while zinc PCA helps regulate sebum and acetyl glucosamine adds brightening and hydration, with vitamin E for antioxidant support. The formula is fragrance-free, alcohol-free, and lightly gel-like, with a brief tightening sensation as it sets. Apply a few drops after cleansing and toner, before moisturizer, morning and/or night. Because 15% is a high concentration, start slowly, every other day at first, and patch test, since strong niacinamide can cause temporary flushing or stinging on sensitive skin. Follow with sunscreen in the daytime when you're using it to fade dark spots.