AHC Ampoule Directory Niacinamide Solution 20 milliliter. Brightening. Tailored care solutions with powerfully effective ingredients for each skin problem. The high niacinamide content at 5 percent and glutathione, the main ingredient in skin whitening injection treatment, make skin brighter and glowing as if lit with a lamp inside. Brightening care with high niacinamide content at 5 percent makes lifeless skin bright and glowing. Glutathione, which is famous for skin whitening effect, and phenylethyl resorcinol obtained from Scots pine make skin even without blemishes. With its Pink Water Splash Texture, the product is lightly absorbed into skin, leaving skin moisturized and without smearing effects even above multiple layers. Clinical Test has proven: help brighten skin and improve melanin condition.