1. The use of a composition comprising: a. one or more omega-3 fatty acids selected from the group consisting of docosahexaenoic acid (DHA), eicosapentaenoic acid (EPA) and docosapentaenoic acid (DPA); and b. a uridine source selected from uridine, deoxyuridine, uridine phosphates, uracil, acylated uridine and cytidine; in the manufacture of a product to improve recognition and / or to treat or prevent impaired recognition function in a subject. 2. The use of claim 1, wherein said subject has one or more symptoms of Alzheimer's disease, mild cognitive impairment, age-related memory impairment, multiple sclerosis, vascular dementia, lobewise dementia, semantic dementia or dementia with Levi bodies. 3. The use of claim 1 or 2, wherein the subject is a patient with a prodromal form of dementia and / or a prodromal form of Alzheimer's disease. The use according to claim 1 or 2, in which the composition contains in a daily dose or, preferably, per 100 ml of the composition: at least 500 mg of DHA, preferably at least 600 mg of DHA and at least 50 mg of uridine, preferably at least 100 mg of uridine. 5. The use of claim 1 or 2, wherein the composition further comprises choline, or its salts or its esters. The use according to claim 1 or 2, in which the composition contains in a daily dose or, preferably, per 100 ml of the composition: 200-600 mg of choline, more preferably 300-400 mg of choline. The use of claim 1 or 2, wherein the composition further comprises one or more components / ingredients selected from the group consisting of phospholipids, vitamin E, vitamin C, selenium, vitamin B12, vitamin�
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