Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 57, Issue 6, Pages 2274-2281Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jf8035116
Keywords
Anthocyanins; metabolism; phenolic acids; urine; human
Funding
- Finnish technology agency TEKES
- Academy of Finland [114526]
- Academy of Finland (AKA) [114526, 114526] Funding Source: Academy of Finland (AKA)
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We studied the metabolism of berry anthocyanins to phenolic acids in six human subjects by giving them bilberry-lingonberry puree with and without oat cereals. Puree + cereals contained 1435 mu mol of anthocyanins and 339 mu mol of phenolic acids. The urinary excretion of measured 18 phenolic acids increased 241 mu mol during the 48 h follow-up after the puree + cereals supplementation. The excretion peak of dietary phenolic acids was observed at 4-6 h after the puree + cereals supplementation and 2 h earlier after the supplementation of the puree alone. Homovanillic and vanillic acids were the most abundant metabolites, and they were partly produced from anthocyanins. No gallic acid, a fragmentation product of delphinidin glycosides, was detected, and only a very low amount of malvidin glycosides was possibly metabolized to syringic acid. Although anthocyanins were partly fragmented to phenolic acids, still a large part of metabolites remained unknown.
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