Trevena Helen, Neal Bruce, Dunford Elizabeth, Haskelberg Hila, Wu Jason H Y
The George Institute for Global Health, The School of Public Health, University of Sydney, P.O. Box M201 Missenden Road, Camperdown, Sydney, NSW 2050, Australia.
The School of Public Health, Faculty of Medicine, Epidemiology and Biostatistics, Imperial College of Science, Technology and Medicine, Praed Street, Norfolk Place, London W2 1PG, UK.
Nutrients. 2015 Aug 21;7(8):7027-41. doi: 10.3390/nu7085321.
Supermarket private-label products are perceived to be lower quality than their branded counterparts. Excess dietary sodium in foods contributes to high blood pressure and cardiovascular disease. Sodium concentrations in products are an important indicator of quality. We compared the sodium content of 15,680 supermarket private-label and branded products, available in four Australian supermarkets between 2011-2013, overall and for 15 food categories. Mean sodium values were compared for: (1) all products in 2013; (2) products in both 2011 and 2013; and (3) products only in 2013. Comparisons were made using paired and unpaired t tests. In each year the proportion of supermarket private-label products was 31%-32%, with overall mean sodium content 17% (12%-23%) lower than branded products in 2013 (p ≤ 0.001). For products available in both 2011 and 2013 there was a ≤2% (1%-3%) mean sodium reduction overall with no difference in reformulation between supermarket private-label and branded products (p = 0.73). New supermarket private-label products in 2013 were 11% lower in sodium than their branded counterparts (p = 0.02). Supermarket private-label products performed generally better than branded in terms of their sodium content. Lower sodium intake translates into lower blood pressure; some supermarket private-label products may be a good option for Australians needing to limit their sodium intake.
超市自有品牌产品被认为质量低于其品牌同类产品。食物中过量的膳食钠会导致高血压和心血管疾病。产品中的钠含量是质量的一个重要指标。我们比较了2011年至2013年间在四家澳大利亚超市销售的15680种超市自有品牌和品牌产品的钠含量，涵盖整体及15个食品类别。比较了以下几种情况的平均钠含量：（1）2013年的所有产品；（2）2011年和2013年都有的产品；（3）仅在2013年有的产品。使用配对和非配对t检验进行比较。每年超市自有品牌产品的比例为31%-32%，2013年自有品牌产品的总体平均钠含量比品牌产品低17%（12%-23%）（p≤0.001）。对于2011年和2013年都有的产品，总体平均钠含量降低≤2%（1%-3%），超市自有品牌和品牌产品在重新配方方面没有差异（p = 0.73）。2013年新的超市自有品牌产品的钠含量比其品牌同类产品低11%（p = 0.02）。超市自有品牌产品在钠含量方面总体表现优于品牌产品。较低的钠摄入量可转化为较低的血压；对于需要限制钠摄入量的澳大利亚人来说，一些超市自有品牌产品可能是个不错的选择。
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