Postprandial Lipaemia Clinical Trial
Official title:
Optimizing Dietary Fatty Acids to Lower Metabolic Risk Factors Among Canadians
Scientists believe that what happens to dietary fats after they are eaten, especially how they cleared from the blood, affects risks of heart disease and diabetes is more important than measuring blood fats after an overnight fast. Little is known about what happens in the 6-8 hours after eating common oils available in Canada such as soybean, canola, olive, sunflower or flax oils. Vegetable oils have different types of fatty acids. This study will gather information on what happens to these fatty acids after they are eaten in a meal. The purpose of this research is to show that clearance of fat from the blood varies with the type of vegetable oil in a meal.
The purpose of the present studies is to show that the types of vegetable oil in a meal
alter postprandial lipaemia and the transport of n-3 fatty acids. The hypothesis is that a
meal which is low in 18:2n-6 and high in the monounsaturated fatty acid 18:1n-9 and 18:3n-3
will result in lower postprandial lipaemia and higher long chain n-3 fatty acids in the
unesterified fatty acids when compared to the same meal either high 18:2n-6 and low 18:3n-3.
The specific objectives are to determine the magnitude and duration of the increase in
plasma TG and the fatty acid composition of chylomicron, LDL and HDL and unesterified fatty
acids over 8 hours following the intake of a standard meal with approx 35- 40% energy from
fat containing different vegetable oils. The objectives are to show that amount and balance
of 18:1n-9, 18:2n-6 and 18:3n-3 in the meal is an important determinant of the extent and
duration of postprandial lipaemia, and the appearance of 18:3n-3 and its metabolites in TG
and unesterified fatty acids. We will use test meals prepared with different amounts of
common fats and oils to provide varying 18:2n-6, 18:3n-3 and 18:1n-9. All the meals will
provide less than 10% energy as saturated fatty acids with approx 35% total energy from fat.
We also aim to identify the most useful single time point to show differences in plasma
post-prandial lipaemia and fatty acids for use in studies in which sequential, repeated
blood sampling in the post meal phase is not practical.
Subject characteristics and baseline parameters will be presented using descriptive
statistics. Differences in the TG response among subjects and different fats and oils will
be assessed using ANOVA, with the use of ANCOVA. Differences in fatty acids at the same time
point among the diets will be compared using ANOVA. Prior to analysis, all data will be
checked and for those displaying non normal distributions. A P-value <0.05 will be
considered statistically significant.
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Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Crossover Assignment, Masking: Single Blind (Subject), Primary Purpose: Health Services Research
| Status | Clinical Trial | Phase | |
|---|---|---|---|
| Completed |
NCT00809874 -
Effects of Dietary Proteins on Postprandial Lipaemia and Incretin Responses in Obese Subjects
|
N/A |