Abstract
The digestibility of triacylglycerols (TAGs) comprising branched-chain fatty acids (BCFAs) and the effects on plasma and hepatic lipid levels in rats were investigated by feeding male Sprague-Dawley rats diets containing 5% (w/w) experimental fats for two weeks. Safflower oil (SO), tripalmitoylglycerol (C16TAG), tri-2-methylpalmitoylglycerol (MeC16TAG), and tri-5,9,13-trimethylmyristoylglycerol (Me3C14TAG) were used as experimental fats. The apparent digestibility followed the order of SO>C16TAG>Me3C14TAG>MeC16TAG. Plasma total and free cholesterol levels were significantly lower in the MeC16TAG-fed rats, while plasma HDL-cholesterol level was lower in the Me3C14TAG-fed rats. The plasma TAG level was also very low in the Me3C14TAG group. However, liver lipid level was not influenced by the dietary fat type. 2-Methylpalmitic acid (MeC16) was not detected in liver lipids of the MeC16TAG group although a low level of MeC16 was present in plasma lipids. A low level of 3,7,11-trimethyllauric acid (Me3C12) and ...
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