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dc.contributor.authorSpeisky, Hernan
dc.contributor.authorRocco, Claudia
dc.contributor.authorCarrasco, Catalina
dc.contributor.authorLissi, Eduardo A
dc.contributor.authorLopez-Alarcon, Camilo
dc.date.accessioned2019-12-05T04:16:51Z
dc.date.available2019-12-05T04:16:51Z
dc.date.issued2006
dc.identifier.issn0951-418X
dc.identifier.doi10.1002/ptr.1878
dc.identifier.urihttp://hdl.handle.net/10072/389534
dc.description.abstractHerbal tea consumption is deeply and widely rooted amongst South-American populations. In view of the involvement of oxygen- and nitrogen-reactive species in the ethiogenesis of several diseases, the antioxidant properties of some of the herbal teas most commonly consumed in the southern regions was assessed in vitro. Around one-third of the 13 examined herbs, displayed a substantially higher ability to scavenge ABTS(+.) radicals (TEAC assay), and to quench the pro-oxidant species, hypochlorite (HClO) and peroxynitrite (ONOO(-)). Amongst the tested herbs, teas prepared from Haplopappus baylahuen, Rosa moschata and Peumus boldus showed the highest TEAC and HClO-quenching activities. These herbs were around 5- to 7-fold more potent than the least active herbs. Based on the TEAC assay, 150 mL of tea prepared from H. baylahuen, R. moschata and P. boldus would be equivalent to around 200 mg of Trolox). Teas from H. baylahuen and P. boldus were also found to be particularly potent in quenching HClO. In the ONOO(-) assay, H. baylahuen and Buddleia globosa showed the highest activities. The results obtained suggest that the regular consumption of teas prepared from some of these herbs may be useful potentially to provide the organism with molecules capable of protecting the gastrointestinal tract against certain pathologically relevant oxidant species.
dc.languageEnglish
dc.language.isoeng
dc.publisherJOHN WILEY & SONS LTD
dc.relation.ispartofpagefrom462
dc.relation.ispartofpageto467
dc.relation.ispartofissue6
dc.relation.ispartofjournalPhytotherapy Research
dc.relation.ispartofvolume20
dc.subject.fieldofresearchChemical sciences
dc.subject.fieldofresearchBiological sciences
dc.subject.fieldofresearchBiomedical and clinical sciences
dc.subject.fieldofresearchcode34
dc.subject.fieldofresearchcode31
dc.subject.fieldofresearchcode32
dc.subject.keywordsScience & Technology
dc.subject.keywordsLife Sciences & Biomedicine
dc.subject.keywordsChemistry, Medicinal
dc.subject.keywordsPharmacology & Pharmacy
dc.subject.keywordsherbal teas
dc.titleAntioxidant screening of medicinal herbal teas
dc.typeJournal article
dcterms.bibliographicCitationSpeisky, H; Rocco, C; Carrasco, C; Lissi, EA; Lopez-Alarcon, C, Antioxidant screening of medicinal herbal teas, Phytotherapy Research, 2006, 20 (6), pp. 462-467
dc.date.updated2019-12-05T00:52:57Z
gro.hasfulltextNo Full Text
gro.griffith.authorCarrasco Pozo, Catalina A.


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