Clinically shown to reduce the appearance of pores, fine lines and wrinkles. Our concentrated niacinamide serum is formulated with pure 12% niacinamide and 2% zinc PCA. This serum combines a high concentration of niacinamide (vitamin B3) with zinc salt of pyrrolidone carboxylic acid to visually refine facial complexion. Appropriate for those with sensitive skin, though a patch test prior to use is advised. Use 1-2 pea-sized drops AM + PM gradually increasing use until skin develops a tolerance. Formulated to be pH level appropriate, Vegan, Skin Compatible, & Dermatologist Tested.