Clermont Université, Université d'Auvergne, Unité de Nutrition Humaine, Saint-Genes-Champanelle, France.
Eur J Clin Nutr. 2010 Nov;64 Suppl 3:S112-20. doi: 10.1038/ejcn.2010.221.
BACKGROUND/OBJECTIVES: The diversity of the chemical structures of dietary polyphenols makes it difficult to estimate their total content in foods, and also to understand the role of polyphenols in health and the prevention of diseases. Global redox colorimetric assays have commonly been used to estimate the total polyphenol content in foods. However, these assays lack specificity. Contents of individual polyphenols have been determined by chromatography. These data, scattered in several hundred publications, have been compiled in the Phenol-Explorer database. The aim of this paper is to identify the 100 richest dietary sources of polyphenols using this database.
SUBJECTS/METHODS: Advanced queries in the Phenol-Explorer database (www.phenol-explorer.eu) allowed retrieval of information on the content of 502 polyphenol glycosides, esters and aglycones in 452 foods. Total polyphenol content was calculated as the sum of the contents of all individual polyphenols. These content values were compared with the content of antioxidants estimated using the Folin assay method in the same foods. These values were also extracted from the same database. Amounts per serving were calculated using common serving sizes.
A list of the 100 richest dietary sources of polyphenols was produced, with contents varying from 15,000 mg per 100 g in cloves to 10 mg per 100 ml in rosé wine. The richest sources were various spices and dried herbs, cocoa products, some darkly coloured berries, some seeds (flaxseed) and nuts (chestnut, hazelnut) and some vegetables, including olive and globe artichoke heads. A list of the 89 foods and beverages providing more than 1 mg of total polyphenols per serving was established. A comparison of total polyphenol contents with antioxidant contents, as determined by the Folin assay, also showed that Folin values systematically exceed the total polyphenol content values.
The comprehensive Phenol-Explorer data were used for the first time to identify the richest dietary sources of polyphenols and the foods contributing most significantly to polyphenol intake as inferred from their content per serving.
背景/目的：膳食多酚的化学结构多样性使得难以估计其在食物中的总含量，也难以理解多酚在健康和疾病预防中的作用。全球氧化还原比色测定法常用于估计食物中的总多酚含量。然而，这些测定法缺乏特异性。个体多酚的含量已通过色谱法确定。这些数据分散在数百篇出版物中，已被编译在 Phenol-Explorer 数据库中。本文的目的是使用该数据库确定 100 种最丰富的膳食多酚来源。
在 Phenol-Explorer 数据库（www.phenol-explorer.eu）中进行高级查询，可检索 452 种食物中 502 种多酚糖苷、酯和苷元的含量信息。总多酚含量计算为所有个体多酚含量的总和。将这些含量值与同一食物中使用 Folin 测定法估计的抗氧化剂含量进行比较。这些值也从同一数据库中提取。使用常见的份量计算每份的份量。
生成了一份含有 100 种最丰富膳食多酚来源的清单，含量从每 100 克 15000 毫克的丁香到每 100 毫升 10 毫克的桃红葡萄酒不等。最丰富的来源是各种香料和干草药、可可制品、一些深色浆果、一些种子（亚麻籽）和坚果（栗子、榛子）以及一些蔬菜，包括橄榄和朝鲜蓟头。还建立了一份含有超过 1 毫克每份总多酚的 89 种食物和饮料的清单。总多酚含量与 Folin 测定法确定的抗氧化剂含量的比较也表明，Folin 值系统地超过总多酚含量值。
首次使用综合的 Phenol-Explorer 数据来确定最丰富的膳食多酚来源，以及根据每份食物中的含量推断出对多酚摄入量贡献最大的食物。
