APLB Glutathione Niacinamide Ampoule Serum 40ml OLIVE YOUNG Global APLB Glutathione Niacinamide Ampoule Serum 40ml Glutathione Niacinamide Serum 40ml 2 weeks to brighter, firmer skin APLB Glutathione Niacinamide Serum + Cream Duo Visibly radiant complex, increase in skin elasticity, and overall skin appearance Make this duo part of Page 1 Reviews APLB, Glutathione Niacinamide, Ampoule Serum, 1.35 fl oz (40 ml) iHerb If your skin's been looking dull and feeling a little sensitive, this one's worth a try. The APLB Glutathione Niacinamide Ampoule Serum helps even out tone without messing with your skin barrier.