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Effects of different dietary sources of cholesterol protein and fiber on lipid metabolism in broiler chicks 3. effects of various dietary vegetables on blood and liver lipids and the excretion of fecal steroids in cholesterol fed chicks



Effects of different dietary sources of cholesterol protein and fiber on lipid metabolism in broiler chicks 3. effects of various dietary vegetables on blood and liver lipids and the excretion of fecal steroids in cholesterol fed chicks



Korean Journal of Animal Science 27(6): 374-380



The present study was undertaken to determine the effects of various whole vegetables on blood and liver lipids and excretion of fecal steroids in chickens fed cholesterol-containing diets. Blood samples were obtained at the end of the experiment by decapitation and feces samples were collected during the last two days of the experiment. The levels of vegetable powders and cholesterol in the experimental diets were 10.0% and 1.0% (w/w), respectively. Vegetable supplemented diets resulted in a marked decrease in serum cholesterol, phospholipids and VLDL + LDL-cholesterol compared to the fiber free diet. In contrast, levels of fecal cholesterol and bile acid excretion were increased in the vegetable supplemented diets. Vegetable supplementation of diets did not affect the serum triglycerides and HDL-cholesterol levels. Lower concentrations of liver cholesterol were obtained in vegetable supplemented groups than the fiber free group. There were no differences in liver triglycerides and phospholipids between vegetable supplemented and fiber free groups. Among the vegetable supplemented diets, the diets containing bellflower roots and wild aster leaves, whose crude fiber contents were higher than the others, resulted in the lowest serum cholesterol. Regression and correlation analysis revealed significant relationships among crude fiber contents of vegetables and lipid parameters in blood and feces. Negative relationships were found between crude fiber contents and serum cholesterol, and between serum cholesterol and fecal steroid excretion. Positive correlations were found between fiber contents and fecal steroid excretion. In conclusion, the present study suggests that dietary vegetables exert a hypocholesterolemic effects by increasing fecal cholesterol and bile acid excretion. Further studies are needed to elucidate the exact mechanisms by which fibers in vegetables decrease serum cholesterol.

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Accession: 005300035

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