Teas, dietary supplements and fruit juices: A comparative study regarding antioxidant activity and bioactive compounds

last updated: 2013-11-05
TitleTeas, dietary supplements and fruit juices: A comparative study regarding antioxidant activity and bioactive compounds
Publication TypePapers in Scientific Journals
Year of Publication2012
AuthorsCosta A. S. G., Nunes M. A., Almeida I. M. C., Carvalho M. R., Barroso M. F., Alves R. C., and Oliveira M. B. P. P.
Abstract

Nowadays, new emerging products claiming antioxidant properties are becoming more frequent. However, information about this topic in their labels is usually scarce. In this paper, we analyzed total phenolics, total flavonoids and ascorbic acid contents, as well as DPPH scavenging activity of several commercial samples, namely green tea and other herbal infusions, dietary supplements, and fruit juices, available in the Portuguese market. In general, beverages containing green tea and hibiscus showed higher phenolics contents (including flavonoids) and antioxidant activity than those without these ingredients. A borututu infusion presented the lowest concentrations of bioactive compounds and scavenging activity, due to the low recommended amount of plant to prepare the beverage. Some juices without antioxidant claims in the label presented similar values to those with it.

JournalLWT - Food Science and Technology
Volume49
Issue2
Pagination324–328
Date Published2012-02-12
PublisherElsevier
DOI10.1016/j.lwt.2012.02.030
KeywordsAntioxidant activity, Ascorbic acid, Juices, Phenolic compounds, Tea Dietary supplements
RightsopenAccess
Peer reviewedyes
Statuspublished

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