Our nicotinamide serum contains carbomer, triethanolamine, and nicotinamide. It can effectively lighten the skin, reduce stains and dullness, and make the skin more even and bright. Its use method is very simple: thoroughly clean the skin and dry it, apply appropriate amount of this product evenly on the face, day, legs and other skin parts of the body, gently massage to promote absorption. And can strengthen the skin barrier function, reduce water loss, enhance skin resistance.