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Low olive oil supplementation reduces triacylglycerols and lipid and oxidative characteristic associated with low density lipoprotein in individuals with intermediate and high cardiovascular risk

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Author(s):
Adriane Bueno Marangoni
Total Authors: 1
Document type: Master's Dissertation
Press: São Paulo.
Institution: Universidade de São Paulo (USP). Faculdade de Saúde Pública (FSP/CIR)
Defense date:
Examining board members:
Nágila Raquel Teixeira Damasceno; Sayuri Miyamoto; Marcelo Macedo Rogero
Advisor: Nágila Raquel Teixeira Damasceno
Abstract

Introduction: Cardiovascular disease is the leading cause of premature morbidity and mortality worldwide, and accounts for a large part of the costs of resources devoted to public policy programs. In this context, the diet is an important tool in managing and reducing the risk of cardiovascular disease. Given that numerous studies show that consumption of omega 9 or food source changes positively several classical cardiovascular risk factors, it becomes important to evaluate its effect on physicochemical properties of LDL and HDL, cardiometabolic and oxidative markers in Brazilian individuals with different levels of cardiovascular risk. Objective: This study aimed to evaluate the effect of consuming olive oil on classical and new cardiometabolic properties in individuals with different levels of cardiovascular risk. Methods: It was a clinical, prospective, randomized, placebo controlled, double blind study based on nutritional intervention. Individuals of both sexes, divided into groups olive oil (AO) and placebo (PL) for 8 weeks received 3 g/d of olive oil or placebo. All subjects were classified for cardiovascular risk following the criteria established by the Framingham Risk Score (FRS). At baseline period, T = 4W and T = 8W the clinical profile, the family history of diseases, blood pressure, food consumption and physical activity level were determined. From plasma or serum obtained after 12 h of fasting lipid profile, apolipoproteins, the size of LDL and HDL, LDL (-) and NEFAS content, and activity of paraoxonase were determined. Adherence to the intervention was monitored by direct means (biochemical markers) and indirect (register of complications). Results: The olive oil was effective in reducing the concentration of triacylglycerol of individuals at high cardiovascular risk (p = 0.023 at T=4W and p=0.049 at T=8W) and LDL-C in individuals with intermediate cardiovascular risk (p=0.045 at T=8W) in the current study. It was also observed a significant reduction in LDL (-) when the sample was divided by the FRS. However, changes in other parameters were not detected when comparing the intervention group and the placebo group. Conclusion: Even at low dosage, olive oil has proved to be beneficial in reducing triglycerides, LDL-C and LDL (-).It is therefore recommended the incorporation of olive oil in the Brazilian diet even in low doses. It is suggested that future studies to use higher doses in order to check additional benefits associated with olive oil consumption. (AU)