Department of Metabolism and Nutrition, Institute of Food Science, Technology and Nutrition (ICTAN-CSIC), José Antonio Novais 10, 28040, Madrid, Spain.
Department of Metabolism and Nutrition, Institute of Food Science, Technology and Nutrition (ICTAN-CSIC), José Antonio Novais 10, 28040, Madrid, Spain.
Food Res Int. 2018 Sep;111:148-152. doi: 10.1016/j.foodres.2018.05.023. Epub 2018 May 16.
Despite increasing interest in the relevance of non-extractable polyphenols (NEPP) or macromolecular antioxidants as food bioactive compounds, most studies on their presence in foods focus mainly on the edible part of specific fruits, but their potential presence in fruit peels is usually ignored. The aim of this study was to evaluate NEPP content in the peels from ten common fruits. The results showed that NEPP made up more than half of the total polyphenol contents in half of the studied samples. HPLC analysis showed that NEPP were constituted by phenolic acids, flavanols and flavonols. Also, it was found that peels accounted for >40% of total NEPP in the fruit in four of the samples analysed. These results should encourage both the use of fruit peels in the fruit industry as ingredients and the consumption of whole fruits given the significant presence of NEPP in fruit peels.
尽管人们对非提取性多酚（NEPP）或高分子量抗氧化剂作为食物生物活性化合物的相关性越来越感兴趣，但大多数关于其在食物中存在的研究主要集中在特定水果的可食用部分，但通常忽略了其在水果果皮中的潜在存在。本研究旨在评估十种常见水果果皮中的 NEPP 含量。结果表明，在一半的研究样本中，NEPP 占总多酚含量的一半以上。HPLC 分析表明，NEPP 由酚酸、黄烷醇和类黄酮组成。此外，研究还发现，在所分析的四个样本中，果皮占水果总 NEPP 的 40%以上。这些结果不仅应该鼓励水果加工业将果皮作为成分使用，还应该鼓励人们食用整个水果，因为水果果皮中存在大量的 NEPP。
