期刊论文详细信息
Nutrition Journal
The effects of changing dairy intake on trans and saturated fatty acid levels- results from a randomized controlled study
Ralph AH Stewart2  Jocelyne R Benatar1 
[1]Cardiovascular Research Unit, Greenlane Cardiovascular Service, Auckland City Hospital, Auckland 1030, New Zealand
[2]Green Lane Cardiovascular Service, Auckland City Hospital, Auckland, New Zealand
关键词: Randomized controlled study;    Palmitelaidic acid;    Vaccenic acid;    Dairy food;    Saturated fatty acids;    Trans fatty acids;   
Others  :  801582
DOI  :  10.1186/1475-2891-13-32
 received in 2013-11-26, accepted in 2014-03-28, published in 13
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【 摘 要 】

Background

Dairy food is an important natural source of saturated and trans fatty acids in the human diet. This study evaluates the effect of dietary advice to change dairy food intake on plasma fatty acid levels known to be present in milk in healthy volunteers.

Methods

Twenty one samples of whole fat dairy milk were analyzed for fatty acids levels. Changes in levels of plasma phospholipid levels were evaluated in 180 healthy volunteers randomized to increase, not change or reduce dairy intake for one month. Fatty acids were measured by gas chromatography–mass spectrometry and levels are normalized to d-4 alanine.

Results

The long chain fatty acids palmitic (13.4%), stearic (16.7%) and myristic (18.9%) acid were most common saturated fats in milk. Four trans fatty acids constituted 3.7% of the total milk fat content. Increased dairy food intake by 3.0 (± 1.2) serves/ day for 1 month was associated with small increases in plasma levels of myristic (+0.05, 95% confidence level-0.08 to 0.13, p = 0.07), pentadecanoic (+0.014, 95% confidence level -0.016 to 0.048, p = 0.02) and margaric acid (+0.02, -0.03 to 0.05, p = 0.03). There was no significant change in plasma levels of 4 saturated, 4 trans and 10 unsaturated fatty acids. Decreasing dairy food intake by 2.5 (± 1.2) serves per day was not associated with change in levels of any plasma fatty acid levels.

Conclusion

Dietary advice to change dairy food has a minor effect on plasma fatty acid levels.

Trial registration

ACTRN12612000574842.

【 授权许可】

   
2014 Benatar and Stewart; licensee BioMed Central Ltd.

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