Full bottle available (not used) 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 water-free alcohol-free oil-free silicone-free gluten-free cruelty-free. water based serum