STRENGTHEN SKIN, RESIST DAMAGE: Our best-selling serum is the culmination of over 25 years of research. Featuring ImuGeneration Technology™ to activate skin’s self-protection. Its dewy hydration sinks into skin so makeup goes on smoothly. As a refreshing pre-treatment, it enhances your regimen and fortifies skin for the day ahead. Infused with powerhouse natural extracts to guard against aging. Skin looks supple, firmer and more resilient.