针对健康猫的商品粮中的铁、铜和锌浓度的评估

针对健康猫的商品粮中的铁、铜和锌浓度的评估

期号：Vol 24, Issue 4,2022, April 1, 2022

作者：Stacie Summers, Jonathan Stockman, Jennifer A Larsen

摘要来源：

https://doi.org/10.1177/1098612X211026254

译员：徐龚达

一校：胡显莹

二校：朱国

编辑：特别

摘要

本研究旨在分析商品粮中铁、铜和锌元素浓度，并比较不同形态的食物（干粮、罐头和生食）、不同年龄段的食品（成年1+和老年7+）以及不同目的食物（成年粮和全年龄粮）中的铁、铜和锌元素的浓度。

将美国针对健康成年猫和老年猫市售的112种商业非处方粮纳入研究对象，分析了其相似成分，并采用电感耦合氩等离子体-光学发射光谱法检测矿物质浓度，采用修改后的Atwater标准计算代谢能。

结果显示，不同猫粮中铁、铜和锌的浓度变化很大，其中，铁浓度中位数58.4mg/1,000 kcal（范围15.7 mg -379.0 mg），铜浓度中位数5.6 mg /1,000 kcal（范围0.8 mg -13.3 mg）和锌浓度中位数为47.6 mg /1,000 kcal（范围7.6 mg -128.1 mg）。

不论采取何种营养充足的论证方法，与美国饲料管理协会(Association of American Feed Control Officials，AAFCO)的标准相比，有13种粮缺乏微量矿物质，其中大多数（11/13）为生食。

生食中的微量矿物质含量明显低于干粮和罐头食品（铜除外）。老年粮中的铁(P=0.019)和锌(P＜0.0001)浓度比成年粮高。成年粮中铁（P= 0.003）和锌（P＜0.001）的浓度比全年龄粮高。

市售健康成年猫和老年猫的商业非处方粮中的铁、铜、锌含量变化很大。少数生食品种粮中缺乏矿物质。目前尚不清楚某些含有高浓度微量矿物质的商品粮是否会产生不利影响，所以需要更多的研究来确定健康猫膳食中微量矿物质摄入量的安全上限。 

关键词：铜，铁，锌，食物，饮食，微量矿物质

原文：

Evaluation of iron, copper and zinc concentrations in commercial foods formulated for healthy cats

Stacie Summers, Jonathan Stockman, Jennifer A 

https://doi.org/10.1177/1098612X211026254

Abstract

Objectives

The aim of this study was to analyze iron, copper and zinc concentrations in commercial foods and compare among food formats (dry, canned, raw), foods marketed by age category (adult 1+ years and senior 7+ years) and foods intended for adult maintenance vs all life stages.

Methods

In total, 112 commercial non-therapeutic food products marketed for healthy adult and senior cats were purchased in the USA. Foods were analyzed for their proximate composition. Trace mineral concentrations were measured using inductively coupled argon plasma–optical emission spectroscopy and described on a calculated metabolizable energy basis using standard modified Atwater values.

Results

Measured iron (median 58.4 mg/1000 kcal [range 15.7–379.0]), copper (median 5.6 mg/1000 kcal [range 0.8–13.3]) and zinc (median 47.6 mg/1000 kcal [range 7.6–128.1]) concentrations were highly variable among cat foods. When all food products – regardless of their nutritional adequacy substantiation method – were compared with the Association of American Feed Control Officials regulatory minimums, 13/112 food products had a mineral deficiency, of which a majority (n = 11/13) were raw food products. Raw foods had significantly lower trace mineral concentrations compared with dry food products and, except for copper, canned food products. Cat foods marketed for senior cats had higher iron (P = 0.019) and zinc (P <0.0001) concentrations than foods marketed for adult cats. Foods intended for adult maintenance had higher iron (P = 0.003) and zinc concentrations than foods intended for all life stages (P <0.0001).

Conclusions and relevance

Iron, copper and zinc concentrations in commercial non-therapeutic foods for adult and senior cats are highly variable. A minority of foods – mainly raw food products – were deficient in these minerals. It is unknown if some foods with high trace mineral concentrations could have adverse effects as studies are needed to establish safe upper limits for dietary intake of trace minerals in healthy cats.

Keywords ：Copper, iron, zinc, food, diet, trace minerals