OBJECTIVE: To determine whether very long-chain n-3 polyunsaturated fatty acids (PUFAs) affect illness and selected plasma cytokines in schoolchildren. STUDY DESIGN:Thai schoolchildren aged 9 to 12 years consumedmilk containing placebo (soybean) oil (n = 86) or fish oil (n = 94) on 5 days per week for 6 months; the latter provided 200 mg eicosapentaenoic acid plus 1 g docosahexaenoic acid daily. Episodes and duration of illness were recorded, and plasma interleukin (IL)-2 receptor, IL-6, IL-10, and transforming growth factor (TGF)-beta1 concentrations and the fatty acid profile of plasma phosphatidylcholine determined. RESULTS: After intervention, very long-chain n-3 PUFAs were higher in plasma phosphatidylcholine in the fish oil group than in the placebo group (P < .001). The fish oil group showed fewer episodes (P = .014) and shorter duration (P = .024) of illness (mainly upper respiratory tract) than the placebo group. Plasma IL-2 receptor, IL-10, and IL-6 were not affected by either treatment. Plasma TGF-beta1 increased in both groups, but the increase was smaller in the fish oil group, and at the end of supplementation TGF-beta1 concentration was lower in the fish oil group (P < .001). CONCLUSIONS: Very long-chain n-3 PUFAs reduce illness, mainly infections, in healthy Thai schoolchildren.
RCT Entities:
OBJECTIVE: To determine whether very long-chain n-3 polyunsaturated fatty acids (PUFAs) affect illness and selected plasma cytokines in schoolchildren. STUDY DESIGN: Thai schoolchildren aged 9 to 12 years consumed milk containing placebo (soybean) oil (n = 86) or fish oil (n = 94) on 5 days per week for 6 months; the latter provided 200 mg eicosapentaenoic acid plus 1 g docosahexaenoic acid daily. Episodes and duration of illness were recorded, and plasma interleukin (IL)-2 receptor, IL-6, IL-10, and transforming growth factor (TGF)-beta1 concentrations and the fatty acid profile of plasma phosphatidylcholine determined. RESULTS: After intervention, very long-chain n-3 PUFAs were higher in plasma phosphatidylcholine in the fish oil group than in the placebo group (P < .001). The fish oil group showed fewer episodes (P = .014) and shorter duration (P = .024) of illness (mainly upper respiratory tract) than the placebo group. Plasma IL-2 receptor, IL-10, and IL-6 were not affected by either treatment. Plasma TGF-beta1 increased in both groups, but the increase was smaller in the fish oil group, and at the end of supplementation TGF-beta1 concentration was lower in the fish oil group (P < .001). CONCLUSIONS: Very long-chain n-3 PUFAs reduce illness, mainly infections, in healthy Thai schoolchildren.
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