An Echinozoa tissue or organ extract comprising antioxidant compounds is disclosed. Also disclosed is a process for obtaining an Echinozoa tissue or organ extract, as well an extract obtained by this process. Compositions comprising such an extract are also described. Uses of such extracts/compositions, as well as corresponding methods of treatment, for example as an antioxidant or to decrease or inhibit oxidative stress in a cell, tissue or subject are also described.
