Cardiovascular Diseases Clinical Trial
Official title:
The Long-Term Effect of Viscous Fibers, Soy Protein, and Plant Sterol Foods in Combination on Serum Cholesterol and Other Risk Factors for Cardiovascular Disease
The purpose of this study is to evaluate the long term effectiveness of the dietary portfolio, consisting of viscous fibers, soy products, nuts and plant sterols, as well as the effects of removing single food components from the dietary portfolio on cholesterol reduction and other cardiovascular risk factors.
We have shown in 1-month metabolic studies that a dietary portfolio, consisting of soy
products, viscous fibers, almonds and plant sterols in the form of margarine, can lower
cholesterol to the same extent as first generation statins (cholesterol-lowering drugs).
However, the long-term effectiveness of the dietary portfolio is not known. Furthermore, it
is not known to what extent each of the food components contribute to the cholesterol
reductions observed. We wish to therefore evaluate the long term effects of the dietary
portfolio as well as the effects of removing single food components from the dietary
portfolio on cholesterol reduction and other cardiovascular risk factors. We believe the
removal of single food components will result in a reduction of the cholesterol-lowering
effect to a similar extent as predicted with the cholesterol reductions observed when the
food component is consumed alone.
Method:
66 subjects will be recruited for a 6-month to 5 year long-term dietary portfolio study with
the option for continuation (re-consenting) at the end of 6, 12 or 24 months. The active
dietary components consist of viscous fibers (including oat bran), soy products (including
soy milk), almonds and plant sterols (sterol-enriched margarine). Lipids, blood pressure,
body weight, and routine biochemical and hematology analyses will be performed over the 5
year period, with lipids and blood pressure measured at 2 monthly intervals. 40-50 subjects
on the long term dietary portfolio study, all of whom will have been on the diet for at least
1 year, will be asked to remove a specific food component from their regular dietary
portfolio for a 10 week period. After the 10 week period, subjects will be asked return to
the normal dietary portfolio with all food components consumed and continue on the long-term
dietary portfolio.
Bloods will be taken at weeks 0, 6 and 10 of the food component removal period; and at
2-monthly intervals for 20 weeks prior to and after the 10 week period while on the long-term
dietary portfolio with all food components.
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