Efficacy Antioxidant and anti-aging: Selenium is a key component of antioxidant enzymes such as glutathione peroxidase, which helps to scavenge free radicals and protect skin cells from oxidative damage. Niacin can improve the energy metabolism and repair ability of skin cells. Repair skin barrier and brighten skin tone: Niacin can promote ceramide synthesis, strengthen skin barrier, reduce water loss, and has the effect of brightening and even skin tone. Zinc helps maintain the integrity of skin structure and promotes skin damage repair. Promote wound healing and skin regeneration: Zinc is an indispensable trace element for cell growth and wound healing. Niacin helps DNA repair and cell renewal.