[BRTC] Niacinamide 20 Ampoule[BRTC] Niacinamide 20 Ampoule 20ml This intensive pore care ampoule contains 20% Niacinamide helps to tighten up pores and control excessive sebum. Tannin Pore Complex and other active ingredients improve skin elasticity while strengthening skin barrier. Skin irritation test completed. How to Use Apply a moderate amount and gently massage for better absorption. Ingredients Water, Niacinamide(20%), Glycerin, Butylene Glycol, Methyl Gluceth 20, 1, 2