Use of hyaluronic acid for preparing compositions for enhancing the protective function of the skin, eye and mucous

Use of at least one hyaluronic acid 30000-45000 Daltons molecular weight, preferably 40,000 Daltons, or corresponding salts thereof, for the preparation of compositions intended for improving the function of protecting the intestinal mucosa under conditions intestinal mucosa selected from gastroenteritis, ischemic necrosis and ulceration of the intestinal mucosa, improving the protection function of the eye under selected from water stress eye disorders, dry eye, injury corneal and keratopathies and in which epithelial cells are involved.