Rice Bran Oil: A Versatile Source for Edible and Industrial Applications (original) (raw)
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Studies on Hypocholesterolemic Activity of Stabilized Rice Bran Oil
Journal of Food and Dairy Sciences
The present investigation was carried out to study the effect of stabilized rice bran oil (SRBO) on hypocholesterolemic activity of experimental rats, and also the effect of feeding with stabilization rice bran oil (SRBO) and blend oil on the growth and lipid parameters of serum and liver of rats. Fatty acids composition and unsaponifiable matter of stabilization rice bran oil and blend oil were determined, Results showed that, stabilization rice bran oil had a higher content of saturated fatty acids (SFA), polyunsaturated fatty acids (PUFA) than that of blend oil. stabilization Rice bran oil contained relatively higher concentration of compesterol, stigmasterol, -sitoisterol, cycloartanol, cycloartenol 24-Methylene cycloartanol and oryzanol compared to the blend oil. The serum total and LDL-cholesterol level of rats that maintained on stabilization rice bran oil diet was significantly lower than those fed on blend oil diet. HDL-cholesterol showed a tendency to be higher. Liver lipids of rats fed on stabilization rice bran oil were also markedly lower than their blend oil fed counterparts. Finally, it can be concluded that, using stabilization rice bran oil had the pronounced effects for lowering cholesterol levels of the blood in experimental rats. The cholesterol lowering ability stabilization of rice bran oil appears to be due to unsaponifiable matter and a higher content of polyunsaturated fatty acids.
Journal of Food and Dairy Sciences, 2008
Number of studies on humans and animals showed lowering effect of rice bran oil (RBO) as well as other vegetable oils in plasma cholesterol levels. The aim of this study was undertaken to compare this effect of two concentrations (1%) and (2%) of Egyptian-RBO active compounds on hypercholesterolaemia in rats. Four groups of six rats were used, the first group was fed on basal diet (control), while the second group was fed on basal diet plus 1% cholesterol. Groups 3 and 4 were fed basal diet +1 % cholesterol + RBO active compounds (1 and 2 % respectively). Non significant differences were noticed in the mean values of body weights, organs weights and relative organs weights (organ wt/body wt) between different experimental groups. The results obtained showed no significant changes in transaminase (AST & ALT) activities between different treated groups. No significant effect was observed in plasma urea and creatinine or hemoglobin in different treated groups compared to control group. On the other hand total cholesterol and low density lipoprotein cholesterol data showed a significant increase in hypercholesterolemic groups (50 % and 168 %) compared to control group. Supplementation with rice bran active compounds in groups 4 decreased its level compared to cholesterol group 2. The data obtained revealed that triacylglycerol was significantly decreased due to supplementation with rice bran oil of groups 3 (by 27. 64 %) and 4 (by 15.07%) compared to hypercholesterolemia in rats of group 2. Conclusion: Rice bran oil active compounds seem to be a very promising phytochemical alternative to classic lipid-lowering agents.
Rice bran oil – palm olein oil blend may attenuate the risk of cardiovascular diseases: results of an in vivo study. Quality and quantify of dietary fats have long been recognized to play a crucial role in several metabolic disorders such as cancer, coronary heart disease, diabetes, obesity and hypertension. It influences serum lipid profile, which normally should have low cholesterol, low triglycerides, low LDL-cholesterol and a high HDL-cholesterol. Ideally, SFA, MUFA and PUFA in diet should not exceed 8-10%, 10-20%, and 10%, respectively. The oil and its blend with such a fatty acid profile, which is virtually non-existent in nature, are expected to have health benefits. We have been able to prepare a binary oil blend with a fatty acid profile quite close to the recommended one, using rice bran oil and palm oil. Serum lipid profile and retinols of rats fed with this blend (called Blend-RP) was studied to evaluate the effect of the blend on parameters associated with the risk of c...
Effect of Blended Rice Bran and Olive Oil on Cardiovascular Risk Factors in Hyperlipidemic Patients
Food and Nutrition Sciences, 2013
The present study was designed to evaluate the effectiveness of blended rice bran and olive oil on hyperlipidemic subjects. A total of 60 moderately hyperlipidemic patients (Total Cholesterol (TC) >200 mg/dl and/or Triglycerides (TG) >150 mg/dl) with an age range of 45-60 were selected from Mediciti Hospital of Ludhiana and were divided into two groups: Group A and Group B containing 30 subjects each. The subjects of Group B were given blended rice bran and olive oil for a time period of 45 days and were asked to continue with their routine eating and physical activity pattern. The subjects of Group A were kept on their regular cooking oil. The serum lipid values were assessed before and after the study. Additional parameters assessed included anthropometry, dietary fat intake and physical activity pattern. The results showed that there was an insignificant change in the average body mass index (BMI) of the subjects of Group B before (27.0 kg/m 2) and after (26.9 kg/m 2) the study respectively. Also, there was an insignificant change in the lipid levels of the subjects of Group B after the study. The levels of TC and LDL cholesterol decreased by 3.7 and 9.0 percent respectively. Whereas, the levels of TG and VLDL cholesterol increased by 9.5 percent in the subjects of Group B after the feeding trials. Further, systolic and diastolic blood pressure of the subjects of Group B reduced by 2.9 and 2.3 percent respectively. An insignificant change was observed in all the parameters of selected subjects. So, the present study recommends carrying out more long duration research studies to evaluate the effectiveness of this blended oil.
Cholesterol Supplementation Attenuates the Hypocholesterolemic Effect of Rice Bran Oil in Rats
Journal of Nutritional Science and Vitaminology, 2000
Rice bran oil (RBO), when blended with safflower oil (SFO) at the ratio of 7 to 3, has been shown to lower serum cholesterol in humans consuming cholesterol. The mechanism as to how this oil blend exerts its effect is not yet clear. This study examined the effect of cholesterol supplementation on the cholesterol-lowering ability of different RBO/SFO blends. Male Sprague Dawley rats (4wk old) were fed purified diets containing 10% fat with or without the addition of 0.5% cholesterol for 3wk. The fat was either SFO or RBO alone, or the mixture of these two oils at the ratio of 7:3 (7S/3R), 5:5 (5S/5R), or 3:7 (3S/7R). Without cholesterol supplementation, there were no significant differences in the serum and liver total cholesterol levels among different dietary fats. However, the HDL cholesterol level of rats fed the RBO-containing diets (especially in rats fed the 3S/7R diet) was higher than that of rats fed the diet containing SFO alone. This resulted in an increase in the ratio of HDL/total cholesterol-a desirable outcome. Supplementation of the diets with 0.5% cholesterol significantly increased the cholesterol level in both the serum and the liver. Increasing the proportion of RBO in the diet further raised the total cholesterol level in the serum whereas it reduced liver cholesterol. Then, the specific effect of the 3S/7R mix ture on the ratio of HDL/total cholesterol disappeared. These findings suggest that choles terol supplemented at the level of 0.5% in this study masked the cholesterol-lowering effect of RBO. Smaller percentages of polyunsaturated fatty acid (i.e., 18:2n-6) in the RBO-con taining diets than in the SFO diet might have reduced their ability to dispose the circulating serum cholesterol into the liver.
Rice Bran’s Effect on Total Cholesterol, HDL, and LDL/HDL Ratio on Hypercholesterolemia Rats
Berkala Kedokteran
Hypercholesterolemia is a metabolism disorder characterized by increased or decreased lipid fraction in plasma. The of this research was to prove the effect of Rice bran to decrease of total Cholesterol rate, ratio of LDL / HDL and increase rate of HDL in hypercholesterolemia male white rats (Rattus norvegicus). The Research of the study was pure experiment by using post test randomized control design. Research Sample divided into five groups. The first group as a negative control, the second group as a positive control, and another groups were given rice brand, with various dose: 0,54 ml/a/day, 1,08 ml/a/day, 1,62 ml/a/day. The results of this research is rice brand can decrease of total cholesterol rate (r2=0,964), decreased of ratio of LDL / HDL (r2=0,836), and increase of rate of HDL (r2=0,951) (ANOVA P=0,000). Rice bran can decrease total cholesterol rate, ratio of LDL / HDL and increase rate of HDL blood.
Journal of research in medical sciences
Cardiovascular disease remains the leading cause of death and disability in industrialized and developing countries. The aim of this research was to determine the effect of rice bran oil, with a low-calorie diet, on lipid profiles, in hyperlipidemic patients. This study was a parallel groups' randomized clinical trial with a pre- and post-test design. Fifty hyperlipidemic patients of both sexes and age range of 25 - 65 years had participated. The patients received a low-calorie diet based on 1400 kcal energy, 17% protein, 26% fat, and 57% carbohydrate per day for four weeks. The treatment group received a low-calorie diet including rice bran oil (30 g / day). Blood samples were obtained after an overnight (12 hours) fasting period before the study and on the last day of the intervention period. Anthropometric indices and levels of serum triacylglycerol, total cholesterol, low-density lipoprotein, and high-density lipoprotein were measured before and after the intervention. In bo...