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Comparison of the endemic Azorean Hypericum foliosum with other Hypericum species: antioxidant activity and phenolic profile.

Authors :
Rainha, Nuno
Lima, Elisabete
Baptista, José
Source :
Natural Product Research; Jan2011, Vol. 25 Issue 2, p123-135, 13p
Publication Year :
2011

Abstract

Water extracts of Hypericum foliosum (HF) from five Azorean Islands were analysed for their antioxidant activity and total phenolic contents. The results were compared with those from medicinal Hypericum species (H. perforatum, H. androsaemum and H. undulatum) and also with Azorean green tea. HF exhibited strong scavenging activity (87-91%) and moderate inhibition of linoleic acid oxidation (56-72%), and presented no significant difference to the other studied plants; in contrast, the synthetic antioxidant butylated hydroxyltoluene showed antioxidant activity values of 22% and 88%, respectively. The average value of phenolics in HF was higher than that in the other Hypericum species and lower than that in tea. Additionally, the phenolic profiles of the Hypericum species were compared by reverse phase-high performance liquid chromatography/ultraviolet (RP-HPLC/UV). The method presented permits the simultaneous determination of phenolic acids, flavonoids, hypericin and hyperforin within 55 min. The most similar profile was observed between HF and H. androsaemum. This study indicates that HF is a source of bioactive compounds with potential health benefits. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
14786419
Volume :
25
Issue :
2
Database :
Complementary Index
Journal :
Natural Product Research
Publication Type :
Academic Journal
Accession number :
57420103
Full Text :
https://doi.org/10.1080/14786419.2010.512560