Precht D, Molkentin J
Institute for Chemistry and Physics, Federal Dairy Research Centre, Kiel, Germany.
Nahrung. 1995;39(5-6):343-74. doi: 10.1002/food.19950390503.
Trans fatty acids (TFA) are supposed to be related to a variety of physiological effects. Numerous studies in this field are gathered and compared, which mainly deal with the influences on lipoprotein levels in plasma and their effects with regard to coronary heart diseases. Furthermore, the analytical accessibility of trans fatty acids by different methods is presented. Thus, the most reliable method for an exact quantitation of trans fatty acids in edible fats is the combination of Ag-TLC with GC. The contents of TFA, in particular trans-octadecenoic acids, in bovine and human milk fat, in partially hydrogenated vegetable fats and oils as well as in processed food from different countries, determined in numerous studies, are summarized. Especially results on the isomeric distribution of positional isomers of trans-octadecenoic acid may be of future interest, since negative metabolic activities might only originate from certain isomers. Finally, intake rates of TFA in several countries are presented. It can be concluded that there still is need for further nutritional studies and that the discussion about TFA should not neglect the comparison with the saturated fatty acids C12, C14 and C16.
反式脂肪酸（TFA）被认为与多种生理效应有关。该领域的众多研究被收集并进行比较，这些研究主要涉及对血浆脂蛋白水平的影响及其与冠心病的关系。此外，还介绍了通过不同方法分析反式脂肪酸的可行性。因此，用于精确定量食用脂肪中反式脂肪酸的最可靠方法是银薄层层析（Ag-TLC）与气相色谱（GC）联用。总结了众多研究中测定的不同国家的牛乳和人乳脂肪、部分氢化植物油以及加工食品中TFA的含量，特别是反式十八碳烯酸的含量。由于负面代谢活性可能仅源于某些异构体，反式十八碳烯酸位置异构体的异构分布结果可能具有未来研究价值。最后，给出了几个国家的TFA摄入量。可以得出结论，仍需要进一步的营养研究，并且关于TFA的讨论不应忽视与饱和脂肪酸C12、C14和C16的比较。
