Department of Food Science, Aarhus University, AU Foulum, Tjele, Denmark.
J Agric Food Chem. 2013 Jan 9;61(1):225-30. doi: 10.1021/jf304079r. Epub 2012 Dec 21.
Phytanic acid (PA) is a bioactive compound found in milk that is derived from the phytol chain of chlorophyll, and the content of PA in milk fat depends on the availability of phytol from feed. In this study, the content of PA diastereomers was analyzed in milk sampled from five organic herds twice during the grazing season (May and September). The total content of PA was higher in September compared to May, but was not affected by breed (Danish Holstein or Danish Jersey). Total PA could not be directly related to intake of green feed items. The distribution between diastereomers was closely related to the amount of grazed clovers, where a higher intake resulted in a higher share of the RRR isomer.
植烷酸（PA）是一种存在于牛奶中的生物活性化合物，来源于叶绿素的植醇链，牛奶脂肪中的 PA 含量取决于饲料中植醇的可用性。在这项研究中，分析了放牧季节（5 月和 9 月）两次从五个有机牛群中采集的牛奶中 PA 差向异构体的含量。与 5 月相比，9 月的 PA 总含量更高，但不受品种（丹麦荷斯坦或丹麦泽西）的影响。PA 的总量不能直接与绿色饲料摄入量相关。差向异构体之间的分布与放牧三叶草的数量密切相关，摄入更多的三叶草会导致 RRR 异构体的比例更高。
