My Favorite Serum is Back and Better Than Ever! Get ready to meet the new @Shiseido Ultimune Power Infusing Serum. Its improved formula gives me deeper hydration, brighter skin, and faster results. The serum delivers 14 powerful amino acids that help nourish and strengthen my skin and support a youthful, rejuvenated appearance. SlowAging ShiseidoUltimune antiaging ltkbeauty serum skincare LTKBeauty LTKOver40 LTKFindsUnder100