The purpose of this study was the investigation of the hypothesis that the enhancement of a refined olive oil with orange peel extract, may improve the postprandial lipidemic, glycemic profile and blood oxidative status, of volunteers with high cardiometabolic risk, due to increased content of bioactive compounds (polyphenols, carotenoids etc.).
In a randomized, acute, single-blinded and cross-over study, participated 21 volunteers with high cardiometabolic risk, aged 30-65, were randomized and divided into two groups. The first group consumed a meal of mashed potatoes with added refined olive oil, rich in fat and carbohydrates (300g, control meal), while the second group consumed mashed potatoes with added olive oil, enhanced with 10% w/w orange peel extract (functional meal). After a one-week washout period, the volunteers were crossed over and consumed the meals in reverse. Blood samples were withdrawn in a fasting state, 30, 90 and 180 min after meal consumption. Plasma Total Antioxidant Capacity (FRAP), serum lipid levels \[Total, High-Density Lipoprotein (HDL-) and Low-Density Lipoprotein (LDL-) cholesterol and triglycerides\], glucose and uric acid were determined at each time point using a biochemical analyzer (Roche Cobas c111).
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
HEALTH_SERVICES_RESEARCH
Masking
SINGLE
Enrollment
21
The functional olive oil was enriched with 10% w/w orange peel extract
Refined olive oil
University of the Aegean
Myrina, Greece
Changes of Antioxidant activity from baseline to 30 minutes, 1.5 hours and 3 hours
Plasma Total Antioxidant Capacity concentration
Time frame: 3 hours
Changes of Low Density Lipoprotein cholesterol (LDL-cholesterol) from baseline to 30 minutes, 1.5 hours and 3 hours
Serum LDL-cholesterol concentration
Time frame: 3 hours
Changes of Total cholesterol from baseline to 30 minutes, 1.5 hours and 3 hours
Serum total cholesterol concentration
Time frame: 3 hours
Changes of High Density Lipoprotein Cholesterol (HDL-cholesterol) from baseline to 30 minutes, 1.5 hours and 3 hours
Serum HDL-cholesterol (HDL-cholesterol) concentration
Time frame: 3 hours
Changes of glucose from baseline to 30 minutes, 1.5 hours and 3 hours
Serum glucose concentration
Time frame: 3 hours
Changes of triglycerides from baseline to 30 minutes, 1.5 hours and 3 hours
Serum triglycerides concentration
Time frame: 3 hours
Changes of uric acid from baseline to 30 minutes, 1.5 hours and 3 hours
Serum Uric Acid concentration
Time frame: 3 hours
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