Canola Oil In Diet Research Articles

Supplementation With Canola Oil in Diet Containing Saturated Fatty Acid. Effect on Serum Fatty Acid Profiles of Growing Rats

Supplementation With Canola Oil in Diet Containing Saturated Fatty Acid. Effect on Serum Fatty Acid Profiles of Growing Rats

Changes on meat fatty acid profile, cholesterol and hepatic metabolism associated with antioxidants and canola oil supplementation for Nellore cattle

This study investigated the effect of canola oil supplementation associated with vitamin E and selenium on cholesterol and liver metabolism and meat fatty acid profile of Nellore cattle. Forty-eight Nellore bulls were randomly assessed to were randomly distributed in a 2 × 2 factorial arrangement: two levels of oil in the diet (no inclusion and 3% canola oil, defined as NO and OIL, respectively) and two levels of antioxidants in the diet (no inclusion and 2.5 mg of Se/kg of dry matter (DM) + 500 UI of vitamin E/kg of DM, defined as NA and ANT, respectively). Blood samples were collected at the beginning (day 0) and at days 28, 56 and 84 of the finishing periods for selenium, total cholesterol and its fractions and triglycerides quantification. After slaughter, liver samples were obtained from each animal to analyze the activity of reduced glutathione (GSH), oxidized glutathione (GSSG), glutathione peroxidase (GSH-Px) and TBARS (substances reactive to 2-thiobarbituric acid). Additionally, 5 g of Longissimus thoracis (LT) were collected for evaluation of cholesterol, ethereal extract and fatty acids profile. Serum selenium concentration has a quadratic increase by antioxidant treatments according to the days on feed. Animal fed ANT presented a better liver antioxidant status, improving the activity of GSSG, GSH-Px, decreasing GSH, TBARS values and decreased the cholesterol concentration in the LT. As well as, decreased cholesterol and LDL-cholesterol in blood serum. Addition of 3% canola oil in diets for cattle improved fatty acid profile in meat and associated with antioxidants (selenium and vitamin E) increased antioxidants status and promoted reducing the cholesterol concentration in meat and serum. Supplementation with canola oil increased unsaturated, decreased saturated fat, increased the amount of n-3 and conjugated linoleic acid (CLA) meat content, and improved the n6/n-3 ratio. As consequence, the supplementation with canola oil and antioxidants in Nellore cattle diet can be a potential strategy to provide meat for human consumption with better lipids content in beef meat, with higher n-3 and lower cholesterol, which might impact positively the meat consumers health.

Feeding antioxidant vitamin and vegetable oils to broilers: vitamin E reduced negative effect of soybean oil on immune response and meat lipid oxidation

This study investigated the effect of feeding vitamin E, vitamin C, and two sources of vegetable oil on immune response and meat quality of broilers. A total of 320 one-day-old chicks were used in a completely randomised design with eight treatments arranged as a 2 × 2 × 2 factorial with two levels of vitamin E (0 and 200 mg/kg), two levels of vitamin C (0 and 1000 mg/kg), and two sources of vegetable oil (soybean and canola). Dietary supplementation of either vitamin E or C increased (P < 0.05) secondary humoral response, whereas oil sources had no significant effect. Broilers fed soybean oil had lower cellular response to the phytohemagglutinin skin test than those fed canola oil in diet, and supplementation of vitamin E increased cellular immune response. However, fat, cholesterol and pH of meat were not affected by source of oil or antioxidants, lipid oxidation was higher (P < 0.05) in thigh and breast meat of broilers fed soybean oil than canola oil. Dietary supplementation of vitamin E decreased (P < 0.05) lipid oxidation in thigh and breast of broilers fed diet containing soybean oil, without any effect on meat oxidation of those fed canola oil. Dietary supplementation of vitamin C increased lipid oxidation in thigh meat of broilers (P < 0.05). It can be concluded that inclusion of soybean oil to the diet, compared with canola oil, increased need for antioxidant. Vitamin E had beneficial effects on immune response and reduced meat lipid oxidation; nonetheless future studies should explore the antioxidant effect of vitamin C in stored meat.

Influence of Dietary Replacement of Menhaden Oil with Canola Oil on Fatty Acid Composition of Sunshine Bass

AbstractThe replacement of menhaden Brevoortia spp. oil with graded levels of canola oil in diets fed for 20 weeks to sunshine bass (female white bass Morone chrysops × male striped bass M. saxatilis) significantly impacted the fatty acid composition of fillets and livers. As the amount of canola oil increased from 0% to 100% of the oil in the diet, the amount of 18:1(n‐9) and 18: 2(n‐6) fatty acids in fillets increased linearly, whereas the amounts of 20:5(n‐3), 22:6(n‐3), long‐chain n‐3 highly unsaturated fatty acids (HUFAs), and total long‐chain HUFAs in the fillets decreased linearly. Total long‐chain n‐3 HUFA levels did not differ significantly between fillets from fish fed a diet with 50% canola oil and those from fish fed 100% menhaden oil. The experimental diets also significantly altered the fatty acid compositions of the livers, though fatty acid levels were highly variable within and among treatments and differences usually were not as pronounced as differences in fillets. We observed no significant differences in weight gain, feed conversion, or total lipid content among fish fed the different diets. Our results suggest that high levels of canola oil in growing diets of sunshine bass could be used for the majority of the production cycle, to be followed by a “finishing” diet that would elevate HUFA levels, thereby increasing the fillets' nutritional benefit to the human consumer.