Medical devices and cosmetic products of the Hyalosan range contain biologically active hyaluronic acid, some of them in combination with lactic acid. Hyaluronic acidis important natural component of many tissues of human body including the skin and mucous membranes. In the vaginal environment it forms a protective gel, which instantly protects and moisturizes mucous membrane, supports natural mechanisms of vaginal mucosa moisturization and accelerates natural process of its regeneration. It also prevents thinning of vaginal mucosa and supports its restoration in a period of natural or chemotherapy- or surgically-induced menopause. Lactic acidis under physiological conditions produced by bacteria, which colonize vaginal mucosa. It ensures acidic environment of vagina, which backwardly supports growing of natural bacterial microflora and also creates unfavourable conditions for the occurrence of undesirable microorganisms.