What it is: A revolutionary nighttime serum that helps defend against visible signs of aging. What it does: This revolutionary nighttime serum helps defend against visible signs of aging. The formula is powered by an advanced delivery system that releases ingredients at the most optimal levels throughout the night, the key time for cellular regeneration. The Night Active Serum is formulated with HOURGLASS Amnio Youth Lipids, a powerful pro-lipid blend featuring vegan phosphatidylglycerol, which mimics a key nutrient in amniotic fluid. The expertly formulated blend accelerates natural cell turnover and replenishes moisture with restoring lipids for skin that appears more radiant and youthful.This formula contains highly active molecules that are light sensitive and is designed to be used at night. Use with the Day Fluid to help maintain and defend the level of balance achieved with Equilibrium Biomimetic Skin Active Serum.Research results:Based on a consumer test of 32 participants after four weeks of use:- 88% said their skin felt softer- 91% said their skin felt smoother- 94% said their skin felt hydratedHow to use: At night, apply 3 to 4 pumps to skin, massaging until product is fully absorbed. Equilibrium Biomimetic Skin Active Serum is a nighttime rebalancing product and should not be used during the day. Store in a dark place. Paraben-free; oil-free; synthetic fragrance-free Made in the USA