[This review of Dr. Dennis Gross Hydra-Pure Vitamin C Brightening Serum began yesterday.]
Many studies in humans have shown that a lipid-silica delivery system (as is used in Dr. Dennis Gross Hydra-Pure Vitamin C Brightening Serum) enhances the penetration and anti-aging effectiveness of the topical antioxidant flavonoid Quercetin.
This delivery system also has a sustained release effect which endures for 24 hours after the initial free radical elimination.
"The enhancing effect on permeation [is] more marked in the deepest horny layer[s]" of the skin. (Comparative Evaluation of the Effect of Permeation Enhancers ...