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Pol J Cosmetol 2023, 26(3): 151-153pl  Polyhydroxy acids - properties and applicationsUrszula Ryś, Małgorzata Dudek Śląska Wyższa Szkoła Medyczna w Katowicach Summary Hydroxy acids are increasingly eagerly used in cosmetological therapies due to their ability to stimulate epidermal exfoliation and skin regeneration, as well as improve its structure and hydration. Hydroxy acids are divided into three groups in terms of their chemical structure and origin: alpha hydroxy acids, beta hydroxy acids and polyhydroxy acids. The latter, also called new generation acids, are organic carboxylic acids that have two or more hydroxyl groups in the molecule. They are derivatives of compounds naturally occurring in the cells of the dermis. They do not cause hypersensitivity to sunlight and have an exfoliating effect similar to alpha hydroxy acids, but they are devoid of their characteristic irritating effect. Their representatives include lactobionic acid and gluconolactone. Polyhydroxy acids are especially recommended for vascular, sensitive, dry and atopic skin. They have a moisturizing and anti-aging effect on the skin, improve its color and strengthen blood vessels. Key words: hydroxy acids, polyhydroxy acids, lactobionic acid, gluconolactone |