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Blood pressure-lowering effects of long chain n-3 fatty acids from meals enriched with liquid fish oil and from microencapsulated powder.

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Authors
Sveinsdottir, Kolbrun
Martinsdottir, Emilia
Ramel, Alfons
Issue Date
2016-12

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Citation
Blood pressure-lowering effects of long chain n-3 fatty acids from meals enriched with liquid fish oil and from microencapsulated powder. 2016, 67 (8):1017-23 Int J Food Sci Nutr
Abstract
Diet plays an important role in the etiology of hypertension. Blood pressure (BP)-lowering properties of long chain n-3 polyunsaturated fatty acids (LC n-3 PUFA) are promising. The aim was to investigate whether different formulations of fish oil differently affect blood pressure in community-dwelling adults. The hypothesis was that fish oil formulations would improve BP in comparison with a placebo.
In this 4-week randomized, placebo-controlled, doubly-blinded dietary intervention study, participants (N = 99, >50 years) from the capital area of Iceland were randomized into three groups. Group 1 (n = 38) received 6 meals/week fortified with a liquid fish oil and placebo powder. Group 2 (n = 30) received conventional (unfortified) meals and microencapsulated powder. Group 3 (n = 31) was the control group which received conventional meals and placebo powder. Calculated on a weekly basis, the amount of EPA + DHA provided was 1.5 g/d. Systolic (SBP) and diastolic BP (DBP) were measured before and after the intervention period.
Seventy-seven subjects finished the study (77.8%). Drop-out rates were not different between groups. According to multivariate statistics, endpoint SBP was lower in Group 1 (-7.0 mmHg, p = 0.037) and in Group 2 (-7.2 mmHg, p = 0.037) as compared with Group 3. There was no significant difference in DBP between the groups.
Our study shows that LC n-3 PUFA from microencapsulated powder are equally effective to meaningfully reduce SBP as LC n-3 PUFA from meals enriched with liquid fish oil in comparison with a control group.
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Additional Links
http://dx.doi.org/ 10.1080/09637486.2016.1208733
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Archived with thanks to International journal of food sciences and nutrition
ae974a485f413a2113503eed53cd6c53
10.1080/09637486.2016.1208733
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