Department of Animal and Aquacultural Sciences, The Norwegian University of Life Sciences, PO Box 5003, Ås 1432, Norway.
Lipids Health Dis. 2013 May 9;12:69. doi: 10.1186/1476-511X-12-69.
Chicken meat nutritional value with regard to fatty acid composition and selenium content depends on the choice of dietary oil and selenium level used in the chickens' feed. The objective of this study was to investigate the effect of replacing commonly used rendered animal fat as a dietary source of saturated fatty acids and soybean oil as a source of unsaturated fatty acids, with palm oil and red palm oil in combinations with rapeseed oil, linseed oil and two levels of selenium enriched yeast on chicken breast meat nutritional value. The study also wished to see whether red palm oil had a cholesterol lowering effect on chicken plasma.204 male, newly hatched broiler chickens were randomly divided into twelve dietary treatment groups, and individually fed one out of six dietary fat combinations combined with either low (0.1 mg Se /kg feed) or high (1 mg Se/kg feed) dietary selenium levels. Linseed oil, independent of accompanying dietary fat source, lead to increased levels of the n-3 EPA, DPA and DHA and reduced levels of the n-6 arachidonic acid (AA). The ratio between AA/EPA was reduced from 19/1 in the soybean oil dietary groups to 1.7/1 in the linseed oil dietary groups. Dietary red palm oil reduced total chicken plasma cholesterol levels. There were no differences between the dietary groups with regard to measured meat antioxidant capacity or sensory evaluation. Chicken meat selenium levels were clearly influenced by dietary selenium levels, but were not influenced by feed fatty acid composition. High dietary selenium level lead to marginally increased n-3 EPA and higher meat fat % in breast muscle but did not influence the other LC PUFA levels. Chicken breast meat nutritional value from the soybean oil and low selenium dietary groups may be regarded as less beneficial compared to the breast meat from the linseed oil and high selenium dietary groups. Replacing rendered animal fat with palm oil and red palm oil had no negative effects on chicken muscle nutritional value with regard to fatty acid composition. Red palm oil decreased total chicken plasma cholesterol, confirming the cholesterol reducing effect of this dietary oil.
鸡肉的脂肪酸组成和硒含量与食用油和鸡饲料中的硒水平有关。本研究旨在研究用棕榈油和红棕榈油代替常用的动物脂肪作为饱和脂肪酸的膳食来源,以及用菜籽油、亚麻籽油和两种硒酵母水平代替大豆油作为不饱和脂肪酸的来源,对鸡胸肉营养价值的影响。本研究还观察了红棕榈油是否对鸡血浆胆固醇有降低作用。204 只雄性、刚孵化的肉鸡被随机分为 12 个饮食处理组,单独喂食 6 种饮食脂肪组合中的一种,这些组合结合了低(0.1mg/kg 饲料)或高(1mg/kg 饲料)饮食硒水平。亚麻籽油,独立于伴随的饮食脂肪来源,导致 n-3 EPA、DPA 和 DHA 水平升高,n-6 花生四烯酸(AA)水平降低。AA/EPA 的比值从大豆油饮食组的 19/1 降低到亚麻籽油饮食组的 1.7/1。饮食红棕榈油降低了总鸡血浆胆固醇水平。在测量的肉抗氧化能力或感官评价方面,饮食组之间没有差异。鸡肉硒水平明显受饮食硒水平的影响,但不受饲料脂肪酸组成的影响。高饮食硒水平导致 n-3 EPA 略有增加,胸肌中的肉脂肪%增加,但不影响其他 LC-PUFA 水平。与亚麻籽油和高硒饮食组相比,大豆油和低硒饮食组的鸡胸肉营养价值可能较低。用棕榈油和红棕榈油代替动物脂肪对鸡肉肌肉的脂肪酸组成的营养价值没有负面影响。红棕榈油降低了总鸡血浆胆固醇,证实了这种食用油的降胆固醇作用。