Effect of triglyceride structure on fat absorption
Effect of triglyceride structure on fat absorption
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DOI：
10.1093/ajcn/60.6.1002s
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发表时间：
1994-01-01
影响因子：
7.1
通讯作者：
Bracco, Umberto
中科院分区：
文献类型：
--
作者：
Bracco, Umberto
脂肪酸在三酰甘油结构上的立体专一性分布影响脂肪的工艺行为以及它们的吸收命运。外部（sn-1和sn-3）位置的长链脂肪酸可能会损害脂肪吸收，从而损害对膳食脂肪的生理反应。牛乳脂肪的消化率低于人乳，这与棕榈酸在两种脂肪中的位置不同有关。对含有硬脂酸-油酸-硬脂酸（SOS）型硬脂酸的可可脂和脂肪的立体专一性分析表明，长链饱和脂肪酸几乎只存在于sn-1和sn-3位置，这可以解释其吸收受损，因此尽管其饱和度和链长，但其对人类血清脂质的中性作用。因此，这些脂肪的真正能量价值需要在混合饮食中得到验证。
Stereospecific distribution of fatty acids on triacylglycerol structures influences the technological behavior of fats as well as their absorption fate. Long-chain fatty acids in external (sn-1 and sn-3) positions may impair fat absorption and therefore the physiological response to dietary fats. Lower digestibility of bovine milk fat compared with that of human milk is related to the different position of palmitic acid in both fats. Stereospecific analysis of cocoa butter and fats containing stearic acid of the stearic-oleic-stearic acid (SOS) type showed that long-chain saturated fatty acids are almost exclusively present in sn-1 and sn-3 positions, which could explain their impaired absorption and therefore their neutral effect on serum lipid in humans despite their saturation and chain length. The true energy value of these fats therefore needs to be verified in mixed diets.