this composition is a topical admixture of submicron vitamin c in percentages of 40 . 001 %- 70 % by weight with exceptional biological activity , and exhibiting deep transdermal penetration . using sodium ascorbate admixed with the 1 - ascorbic acid reduces the epidermal irritation of high concentrations of total vitamin c . the sodium ascorbate naturally buffers the acidity of 100 % 1 - ascorbic acid polyolprepolymer - 2 enhances the epidermal penetration .