Indicated Prevention With Omega-3 Fatty Acids in Adolescents With 'At-Risk-Mental-State' for Psychosis

The active treatment is a supplement of yellow gelatin 0.5 g fish oil capsules. The daily dose of 4 (2x2) capsules provides 700 mg of eicosapentaenoic acid and 500 mg of docosahexaenoic acid, and 10 mg of Vitamin E. Placebo treatment comprises coconut oil capsules, carefully matched with the active treatment with respect to both appearance and flavor, also containing 10 mg Vitamin E, and 10 mg of fish oil to mimic taste. Coconut oil was chosen as placebo because it does not contain polyunsaturated fatty acids and has no impact on n-3 fatty acid metabolism. The intervention period is 12 weeks.