Journal
BIOLOGICAL TRACE ELEMENT RESEARCH
Volume 155, Issue 2, Pages 221-227Publisher
HUMANA PRESS INC
DOI: 10.1007/s12011-013-9790-9
Keywords
Yeast chromium; L-carnitine; Sheep; Lipid metabolism; Interaction
Funding
- China National Natural Science Foundation [31172376]
- Shanxi Province Natural Science Foundation [2011021030-3]
- Program for the Top Young Academic Leader of Higher Learning Institution of Shanxi
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A 56-day feeding experiment was conducted to investigate the effects of yeast chromium (Cr, 300 mu g/kg diet) and/or l-carnitine (100 mg/kg diet) on lipid metabolism and their interaction in sheep. After a 14-day adaptation period, 32 3-month-old sheep were randomly divided into four groups of eight. All sheep were fed with basal diets according to the American feeding standard of the National Research Council. At the end of the experiment, yeast Cr and/or l-carnitine supplementation significantly decreased abdominal fat mass and abdominal fat percentage, suggesting an improved mutton quality. Compared with the control group, the ratio of glucose to insulin was significantly increased, due to unchanged glucose levels and reduced insulin levels in yeast Cr and/or l-carnitine supplement groups, indicating high insulin sensitivity and well-controlled serum glucose levels. In addition, yeast chromium and/or l-carnitine induced significant decreases in serum triglyceride levels and serum total cholesterol levels, while increasing serum free fatty acid levels and high-density lipoproteincholesterol levels. The findings show that adding a yeast Cr and/or l-carnitine supplement may give better control of glucose and lipid variables.
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