Plasma lipid effects of corn oil and extra-virgin olive oil in hypercholesterolaemic subjects: A randomised, controlled trial
The aim of our study was to directly compare the metabolic effect of monounsaturated fatty acid rich oils and polyunsaturated
fatty acid rich oils on the plasma lipid pattern of moderately hypercholesterolaemic subjects under controlled isocaloric
condition. After a 30-day run-in diet, 44 healthy Caucasian subjects with moderate hypercholesterolaemia were randomly assigned
to one of four different isocaloric diets, differing only regarding the oil used (corn oil, corn oil supplemented with vitamin
E, extra-virgin olive oil or different self-selected oils), for 45 days. At the end of the study, when compared to the baseline
value, low-density lipoprotein (LDL)-cholesterolaemia was significantly lower only in patients taking corn oil (−13.9%; 95%CI
−5.9 to −20.1; p = 0.02) or corn oil with added vitamin E (−19.1%; 95%CI −6.9 to −24.1; p = 0.03). Differences in plasma high-density lipoprotein (HDL)-cholesterol and triglyceride levels from baseline levels and
between the four diets did not reach statistical significance.
Available from: Seyedeh mahdieh Namayandeh
- "95% CI = −5.9 to −20.1; P = 0.02) or corn oil with added vitamin E (−19.1%; 95% CI = −6.9 to −24.1; P = 0.03). Differences in plasma HDL-C and TG levels from baseline levels and between the four diets did not reach statistical significance. Low sample size can be considered as a limitation of our study and hence we suggest to perform study with higher sample size in future. "
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ABSTRACT: The study on natural substances especially, dietary components such as liquid oils affecting cholesterol can be important for therapeutic propose. Sesame seeds with various biomedical actions can be control the hypercholesterolemia. On the other hand, olive oil has a wide range of therapeutic effect on lipid profile in human. The aim of this study is to evaluate and compare lipid profile changes after olive and sesame oils consumption in hypercholesterolemia.
This study was a clinical randomized trial that was performed via parallel design on 48 patients. The patients were randomly allocated in to two groups: A: olive oil and B: sesame oil. After 1 month prescription of Step I National Cholesterol Education Program diet, patients consumed 4 table spoons aprox. 60 g) of refined olive or sesame oil daily as an exchange of other oils, for 1 month. Lipid profiles The P < 0.05 was considered as significant difference.
Out of 48 patients, 24 (50%) were men. The mean age was 41.7 ± 8.3 years. The mean of total cholesterol, triglyceride (TG), low density lipoprotein (LDL), cholesterol, and high density lipoprotein (HDL) cholesterol, before oil consumption was 224.5 ± 22, 256 ± 132, 132.6 ± 9, and 44.5 ± 11 mg/dl. After olive oil consumption cholesterol, TG, LDL-C, weight, waist and BMI were decreased and HDL-C was increased. After sesame oil consumption cholesterol, TG, LDL-C were significantly decreased. Weight, waist were decreased and HDL-C was increased (P > 0.05).
Sesame oil had equivalent effect on lipid profile in comparison olive oil and lipid profile improvement was better in sesame oil in LDL-C and TG.
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ABSTRACT: Sesame oil could be considered as a potent antioxidant and dietary supplement. It possesses antimutagenic, anti-inflammatory and anti-cardiac toxicity. In the view of available findings, the current study focused on determining the protective effects of sesame oil on 4-Nitroquinoline-1-oxide (4-NQO) -induced oxidative DNA damage and lipid peroxidation (LPO) in rats. Seven groups of Wistar albino rats each with 6 either sex were used. Groups were given vehicle control and sesame oil alone orally and 4-NQO (30 mg/kg) by intraperitoneal injection. Following the four dose levels (1, 2, 4, and 8 ml/kg orally), sesame oil plus 4-NQO were also tested. After 24 hours of 4-NQO injection, blood samples were drawn by venipuncture. DNA damage (8-hydroxy-2-deoxy guanosine; 8-OHdG) and LPO were estimated. LPO from the 4-NQO-treated group was 2.5-fold higher than that of the control LPO. Pretreatment with sesame oil reduced this by 16-61%. 8-OHdG DNA damage from 4-NQO was found to be 3-fold higher than that of controls. Pretreatment with sesame oil effectively protected against DNA damage in a dose-dependent fashion. This study indicates that the antioxidant, sesame oil, effectively protected DNA damage and LPO induced by 4-NQO.
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