"Hyaluronic Acid is a major component of skin, where it is involved in tissue repair. Topically applied, hyaluronic acid forms an air permeable layer and penetrates into the dermis, thus boosting the elasticity and hydration of the skin. The protective barrier on the skin locks in moisture, which gives the skin a youthful appearance. As we age, skin moisture can drop significantly, which creates aging like effects on skin appearance as it loses its elasticity. Thus hyaluronic acid can play a critical role in skin health with its unique ability to hold in moisture. IPKN 100% Hyaluronic Acid serum does not contain any fragrances, artificial colors, chemical additives, no silicones. It is 100% pure and undiluted. Size: 20ml Instruction This serum can be used by using a drop and mixing it up with the lotion / emulsion to soothe dry skin. " We are an authentic dealer selling authentic products.