Abstract
Low-fat, high-fiber diets may influence the variables of blood coagulation and fibrinolysis associated with cardiovascular morbidity. Dietary fat content has been suggested as the important determinant. This hypothesis was tested in a strictly controlled dietary study of 13 healthy individuals. They were fed two experimental diets in a 2 x 2-week crossover trial. The diets differed in fat content (39% versus 31% of total energy), whereas the fatty acid composition and the fiber content were virtually identical. We observed no significant differences between diets in terms of fasting plasma levels of factor VII coagulant activity, fibrinogen, euglobulin fibrinolytic activity, tissue-type plasminogen activator (t-PA) activity, t-PA antigen, plasminogen activator inhibitor type 1 (PAI-1) antigen, or PAI activity. Serum levels of total cholesterol, high density lipoprotein cholesterol, and triglycerides were also unaffected. In conclusion, a moderate reduction in dietary fat intake, at a fixed fatty acid composition and dietary fiber intake, did not significantly influence blood coagulation, fibrinolysis, or blood lipids in the fasting state.
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