1. A composition for treating a pathological condition of a joint in a subject, comprising:! a) at least one omega-3 fatty acid,! b) at least one glycosaminoglycan,! c) at least one amino sugar,! d) at least one antioxidant and! e) carnitine or acetylcarnitine. ! 2. The composition according to claim 1, in which the omega-3 fatty acid is selected from the group consisting of alpha-linoleic acid (ALA), docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA). ! 3. The composition according to claim 1, in which the glycosaminoglycan is selected from the group consisting of chondroitin sulfate, dermatan sulfate, keratan sulfate, heparin, heparan sulfate and hyaluronan. ! 4. The composition according to claim 1, in which the amino sugar is selected from the group consisting of galactosamine, glucosamine, sialic acid and N-acetylglucosamine. ! 5. The composition according to claim 1, in which the antioxidant is selected from the group consisting of vitamin C, tocopherols, tocotrienols, glutathione, lipoic acid, melatonin and beta-carotene. ! 6. The composition according to any one of claims 1 to 5, additionally containing at least one dietary mineral substance. ! 7. The composition according to claim 6, in which this dietary mineral substance is selected from the group consisting of potassium chloride, calcium carbonate, choline chloride, iodized salt, thiamine mononitrate, calcium pantothenate, ferrous sulfate, zinc oxide, copper sulfate, oxide manganese, calcium iodate and sodium selenite. ! 8. The composition according to claim 7, additionally containing at least one essential amino acid. ! 9. A method of treating a pathological condition of a joint in a subject, comprising administering the compositions of claim 1 to a subject in need thereof. ! 10. The method according to �1. Композиция для лечения патологического состояния сустава у субъекта, содержащая: ! a) по меньшей мере одну омега-3 жирную кислоту, ! b) по меньшей мере один гликозаминогликан, ! c) по мень
