Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.22/2143
Título: Teas, dietary supplements and fruit juices: a comparative study regarding antioxidant activity and bioactive compounds
Autor: Costa, A. S. G.
Nunes, M. A.
Almeida, I. M. C.
Carvalho, M. R.
Barroso, M. Fátima
Alves, Rita C.
Oliveira, M. Beatriz P. P.
Palavras-chave: Antioxidant activity
Ascorbic acid
Phenolic compounds
Tea
Dietary supplements
Juices
Data: 2012
Editora: Elsevier
Relatório da Série N.º: Food Science and Technology; Vol. 49; Issue 2
Resumo: 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.
Peer review: yes
URI: http://hdl.handle.net/10400.22/2143
ISSN: 0023-6438
Versão do Editor: http://www.sciencedirect.com/science/article/pii/S0023643812001922
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