This revolutionary nighttime re-balancing treatment contains a plant-derived bio-identical version of Phosphatidylglycerol, the ingredient found in high concentrations in amniotic fluid, that normalizes skin cell growth and helps defend against the visible signs of aging. Microscopic oil droplets deliver the ingredients into the skin at the most optimal levels for radiant skin. Normalizing: Compromised by age and environmental factors, skin cells can lose their regenerative balance and may not differentiate at a healthy rate. As a result of this imbalance, skin can look too thin, thick, dehydrated or dull. Research has shown that normalizing this differentiation process can hold the key to skin rejuvenation and anti-aging. The advanced serum elevates skin to a visibly youthful equilibrium. Not tested on animals, Hourglass is proud to be cruelty free brand. Hourglass products are formulated without parabens, fragrance and gluten.