MULTI-ACTIVE DELIVERY ESSENCE 3.38FLOZ. Benefits: Instantly hydrates and conditions, for softer-feeling skin. Doubles the penetration /delivery of niacinamide after 1 hour. Skin looks instantly more luminous. Key Ingredients: 10% Glycerin: A humectant that is widely known to help improve skin hydration and elasticity, and which can help improve delivery of key technologies within a formulation. 5% Propanediol: An effective penetration enhancer which can help to increase the delivery of key ingredients by supporting skins water content, water retention and skin barrier. Sodium Caproyl Prolinate: An amino-acid derivative which hydrates the skin to help improve the delivery of ingredients. Glycogen: A polysaccharide that energizes skin. It has also been shown to help support skin hydration and essential barrier lipids for more moisturized skin.. :