What is Chiral? Most skin care ingredients are chiral. This means they have a "left" and a "right" chemical orientation, much like our hands (chiral, pronounced "ki-rul," is Greek for hands). Chiral molecules, like our hands, are identical mirror images of each other, some of these fit into the skins receptors while others do not. Usually only one of the mirror images is good for your skin, so it is necessary to use only these when formulating effective products.