This study proposes a review on hyaluronic acid (HA) known as hyaluronan or hyaluronate and its derivates and their application in cosmetic formulations. HA is a glycosaminoglycan constituted from two disaccharides (N-acetylglucosamine and D-glucuronic acid). isolated initially from the vitreous humour of the eye. and subsequently discovered in different tissues or fluids (especially ... https://www.lightemupsequences.com/