Trans (t) fatty acids (TFA) from partially hydrogenated vegetable oils (i.e., industrial trans) have been phased out of foods in many countries due to their promotion of cardiovascular disease. This leaves ruminant-derived foods as the main source of TFA. Unlike industrial TFA where catalytic hydrogenation yields a broad distribution of isomers, ruminant TFA are enzymatically derived and can result in enrichment of specific isomers. Comparisons between industrial and ruminant TFA have often exonerated ruminant TFA due to their lack or at times positive effects on health. At extremes, however, ruminant-sourced foods can have either high levels of t10- or t11-18:1, and when considering enriched sources, t10-18:1 has properties similar to industrial TFA, whereas t11-18:1 can be converted to an isomer of conjugated linoleic acid (cis(c)9,t11-conjugated linoleic acid), both of which have potential positive health effects. Increased t10-18:1 in meat-producing ruminants has not been associated with negative effects on live animal production or meat quality. As such, reducing t10-18:1 has not been of immediate concern to ruminant meat producers, as there have been no economic consequences for its enrichment; nevertheless at high levels, it can compromise the nutritional quality of beef and lamb. In anticipation that regulations regarding TFA may focus more on t10-18:1 in beef and lamb, the present review will cover its production, analysis, biological effects, strategies for manipulation, and regulatory policy.

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反刍动物肉中的 Trans-10 18:1：评论

来自部分氢化植物油（即工业反式）的反式( t ) 脂肪酸 (TFA)已在许多国家被淘汰，因为它们会促进心血管疾病。这使得反刍动物食品成为反刍动物食品的主要来源。与催化氢化产生广泛分布的异构体的工业 TFA 不同，反刍动物 TFA 是酶促衍生的，可导致特定异构体的富集。工业和反刍动物反刍动物 TFA 之间的比较经常证明反刍动物反刍动物反刍动物 TFA 缺乏或有时对健康有积极影响。然而，在极端情况下，反刍动物来源的食物可能具有高水平的t 10- 或t 11-18:1，并且在考虑富集来源时，t10-18:1 具有与工业 TFA 相似的性质，而t 11-18:1 可以转化为共轭亚油酸 ( cis ( c )9, t 11-conjugated linoleic acid) 的异构体，两者都具有潜在的积极性健康影响。肉类生产反刍动物的t 10-18:1增加与对活体动物生产或肉质的负面影响无关。因此，减少t 10-18:1 并没有引起反刍动物肉生产商的直接关注，因为其浓缩没有经济后果；然而，在高含量时，它会损害牛肉和羊肉的营养质量。预计有关 TFA 的法规可能会更多地关注t10-18:1 在牛肉和羊肉中，本综述将涵盖其生产、分析、生物效应、操作策略和监管政策。