Valencak Teresa G, Gamsjäger Lisa, Ohrnberger Sarah, Culbert Nicole J, Ruf Thomas
Department of Integrative Biology and Evolution, Research Institute of Wildlife Ecology, University of Veterinary Medicine, Vienna, Savoyenstrasse 1, 1160, Vienna, Austria.
BMC Res Notes. 2015 Jun 27;8:273. doi: 10.1186/s13104-015-1254-1.
Intensive farming of livestock along with recent food scandals and consumer deception have increased awareness about risks for human nutrition. In parallel, the demand for meat obtained under more natural conditions from animals that can freely forage has largely increased. Interestingly, the consumption of game meat has not become more common despite its excellent quality and content of polyunsaturated fatty acids (PUFAs).
We addressed the question if game meat fatty acid composition is modified through kitchen preparation. By analysing muscle fatty acid (FA) composition (polar and total lipids) of five European game species in a raw and a processed state, we aimed to quantify the proportion of PUFA that are oxidised and hydrogenated during processing. All game meat species originated from local hunters and free-living individuals. To mimic a realistic situation a professional chef prepared the meat samples with gentle use of heat in a standardised way.
Expectedly, the overall content of polyunsaturated fatty acids declined during the cooking process but the decrease size was <5% and the nutritiously most important n-3/n-6 ratio was not affected by processing (F1,54 = 0.46; p = 0.5). Generally, our samples contained species-specific high PUFA and n-3 FA contents but we point out that differentiating between species is necessary.
Game meat thus provides a healthy meat source, as cooking does not substantially alter its favourable fatty acid composition. Further research is needed to elucidate species-specific differences and the role of habitat quality and locomotion for tissue composition.
集约化养殖牲畜,加上近期的食品丑闻和消费者欺诈行为,提高了人们对人类营养风险的认识。与此同时,人们对从能够自由觅食的动物身上获取的更天然条件下的肉类需求大幅增加。有趣的是,尽管野味肉品质优良且富含多不饱和脂肪酸(PUFAs),但其消费并未变得更加普遍。
我们探讨了野味肉脂肪酸组成是否会因厨房烹饪而改变这一问题。通过分析五种欧洲野味物种生肉和加工后肉的肌肉脂肪酸(FA)组成(极性和总脂质),我们旨在量化加工过程中氧化和氢化的PUFA比例。所有野味肉均来自当地猎人及自由放养的个体。为模拟实际情况,一名专业厨师以标准化方式温和加热制备肉样。
不出所料,烹饪过程中多不饱和脂肪酸的总体含量下降,但降幅小于5%,且营养上最重要的n-3/n-6比例不受加工影响(F1,54 = 0.46;p = 0.5)。总体而言,我们的样本中特定物种的PUFA和n-3 FA含量较高,但我们指出区分物种很有必要。
因此,野味肉是一种健康的肉类来源,因为烹饪不会显著改变其有利的脂肪酸组成。需要进一步研究以阐明物种特异性差异以及栖息地质量和运动对组织组成的作用。