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Evaluation of the antioxidant properties of fruit and flavoured black teas.
Eur J Nutr. 2011 Dec; 50(8):681-8.EJ

Abstract

OBJECTIVE

Antioxidant properties of the water extracts of the commercial bagged fruit and flavoured black teas were evaluated and compared with typical black teas of C. sinensis.

METHODS

Folin-Ciocalteu (FC) assay, cupric ion reducing antioxidant capacity (CUPRAC) and DPPH radical method were used for these purposes. The content of selected flavonoids and phenolic acids was also determined by high-performance liquid chromatography with tandem mass spectrometry in the negative electrospray ionization mode.

RESULTS

Flavoured black teas contain significantly higher level of catechins, quercetin, and rutin, while the content of chlorogenic and caffeic acids as well as naringin and hesperidin was higher in fruit teas. Supplementation with these flavonoids could reduce blood glucose. In FC and DPPH assays, the antioxidant properties of studied tea infusion increases in the order: fruit tea < flavoured black tea > premium black tea, while in CUPRAC method, some aromatized teas exhibit the highest antioxidant properties. Tea infusions with nice smell of fruits would also support the human diet with some source of antioxidants.

Authors+Show Affiliations

Department of Chemistry, University of Warsaw, Pasteura 1, 02-093, Warsaw, Poland.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

21360165

Citation

Pękal, Anna, et al. "Evaluation of the Antioxidant Properties of Fruit and Flavoured Black Teas." European Journal of Nutrition, vol. 50, no. 8, 2011, pp. 681-8.
Pękal A, Dróżdż P, Biesaga M, et al. Evaluation of the antioxidant properties of fruit and flavoured black teas. Eur J Nutr. 2011;50(8):681-8.
Pękal, A., Dróżdż, P., Biesaga, M., & Pyrzynska, K. (2011). Evaluation of the antioxidant properties of fruit and flavoured black teas. European Journal of Nutrition, 50(8), 681-8. https://doi.org/10.1007/s00394-011-0179-2
Pękal A, et al. Evaluation of the Antioxidant Properties of Fruit and Flavoured Black Teas. Eur J Nutr. 2011;50(8):681-8. PubMed PMID: 21360165.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Evaluation of the antioxidant properties of fruit and flavoured black teas. AU - Pękal,Anna, AU - Dróżdż,Paulina, AU - Biesaga,Magdalena, AU - Pyrzynska,Krystyna, Y1 - 2011/03/01/ PY - 2010/11/04/received PY - 2011/02/17/accepted PY - 2011/3/2/entrez PY - 2011/3/2/pubmed PY - 2012/3/8/medline SP - 681 EP - 8 JF - European journal of nutrition JO - Eur J Nutr VL - 50 IS - 8 N2 - OBJECTIVE: Antioxidant properties of the water extracts of the commercial bagged fruit and flavoured black teas were evaluated and compared with typical black teas of C. sinensis. METHODS: Folin-Ciocalteu (FC) assay, cupric ion reducing antioxidant capacity (CUPRAC) and DPPH radical method were used for these purposes. The content of selected flavonoids and phenolic acids was also determined by high-performance liquid chromatography with tandem mass spectrometry in the negative electrospray ionization mode. RESULTS: Flavoured black teas contain significantly higher level of catechins, quercetin, and rutin, while the content of chlorogenic and caffeic acids as well as naringin and hesperidin was higher in fruit teas. Supplementation with these flavonoids could reduce blood glucose. In FC and DPPH assays, the antioxidant properties of studied tea infusion increases in the order: fruit tea < flavoured black tea > premium black tea, while in CUPRAC method, some aromatized teas exhibit the highest antioxidant properties. Tea infusions with nice smell of fruits would also support the human diet with some source of antioxidants. SN - 1436-6215 UR - https://www.unboundmedicine.com/medline/citation/21360165/Evaluation_of_the_antioxidant_properties_of_fruit_and_flavoured_black_teas_ L2 - https://dx.doi.org/10.1007/s00394-011-0179-2 DB - PRIME DP - Unbound Medicine ER -