The invention relates to the 4-((2E,4E,6E)-octa-2,6,4-trienamid)butanoic acid； its use in the therapeutic and cosmetic field for topical application to the skin to achieve a combined antioxidant activity against ROS together with an anti-inflammatory effect and an effect of promoting the production of hyaluronic acid, so as to oppose at the same time the oxidizing action of free radicals and inflammatory effects, in order to preserve the physiological conditions of human epidermis and skin homeostasis and prevent skin aging (anti-aging)； the compositions for therapeutic and cosmetic use which comprise 4-((2E,4E,6E)-octa-2,6,4-trienamid)butanoic acid as active ingredient, formulated with excipients for topical use suitable for local administration on the skin.
