Our Niacinamide 10% + Zinc 1% formula is a water-based serum that boosts skin brightness, improves skin smoothness and reinforces the skin barrier over time. It contains a high 10% concentration of Niacinamide (vitamin b3) and zinc PCA. Note: Niacinamide and Zinc PCA is not a treatment for acne. For persistent acne-related conditions, we recommend speaking to your health care provider regarding treatment options. This formulation can be used alongside acne treatments if desired for added visible skin benefits.