Middleton Maureen, Olivares Manuel, Espinoza Alejandra, Arredondo Miguel, Pizarro Fernando, Valenzuela Carolina
Laboratorio de Micronutrientes, Instituto de Nutrición y Tecnología de los Alimentos (INTA), Universidad de Chile, Av El Libano 5524, Macul, Santiago 7830490, Chile.
Escuela de Ingeniería Civil Industrial, Universidad Diego Portales, Vergara 432, Santiago 8370014, Chile.
Animals (Basel). 2021 Mar 11;11(3):776. doi: 10.3390/ani11030776.
The aim of this work was to determine in an exploratory manner the effect of excessive iron supplementation on iron, zinc, and copper contents in pork and pork offal. Pigs averaging 50 days in age and 15 ± 1.3 kg body weight were allocated to a control group (500 ppm dietary Fe) and a supplemental group (3000 ppm dietary Fe). After an iron supplementation period of 60 days, blood samples were analyzed to determine iron biomarkers, serum copper, and zinc contents. Animals were slaughtered to assess total iron, non-heme iron, heme iron, zinc, and copper contents in samples of nine meat cuts and some offal. Iron supplementation improved the iron status in pigs with increased hemoglobin and hematocrit, but did not affect serum levels of iron, zinc, and copper. Iron supplementation did not affect the heme and non-heme iron contents of the different meat cuts. Zinc contents decreased by 32-55% in meat cuts, where iron content increased in the liver, spleen, kidneys, and pancreas. No differences of zinc and copper were observed in offal samples. High concentrations of iron supplementation reduce zinc content in pork.
这项工作的目的是以探索性方式确定过量补铁对猪肉及猪内脏中铁、锌和铜含量的影响。将平均50日龄、体重15±1.3千克的猪分为对照组（日粮铁含量500 ppm）和补充组（日粮铁含量3000 ppm）。在补铁60天后，对血液样本进行分析以测定铁生物标志物、血清铜和锌含量。宰杀动物以评估九种肉块和一些内脏样本中的总铁、非血红素铁、血红素铁、锌和铜含量。补铁改善了猪的铁状态，血红蛋白和血细胞比容增加，但未影响血清铁、锌和铜水平。补铁未影响不同肉块中血红素铁和非血红素铁的含量。在铁含量增加的肝脏、脾脏、肾脏和胰腺等肉块中，锌含量下降了32%至55%。在内脏样本中未观察到锌和铜的差异。高浓度补铁会降低猪肉中的锌含量。
