“Small” differences in chemical structure make a world of difference in the behavior of the chemical and its effect on your skin. Here, we have a few examples illustrating different aspects of chemical structure and how they are used in skin care products. Azelaic Acid and Azeloyl Glycine. Adding an amino acid makes a world of difference in solubility and effect on the skin, azeloyl glycine is soluble in water-based serums and creams. Retinol is an alcohol, and retinyl acetate is an ester; both are retinoids, forms of Vitamin A. The skin can convert one into the other, but they differ in their stability, making retinyl acetate the ingredient of … Continue reading What a difference chemical structure makes!