Abstract
Methanolic extracts of Hypericum perforatum (HP) grown in Northern Greece were consistently rich in total polyphenols – reaching 71.9±6.8g gallic acid equivalent (GAE)/100g (N=6) as assayed by Folin Ciocalteu reagent. Among the individual polyphenols identified and quantified by GC/MS in the form of their trimethylsilylethers, epicatechin, catechin and quercetin predominated comprising 94.3±3.2% (N=6) of the determined polyphenols, while their respective concentrations were 118.9±20.6, 8.7±1.4 and 5.8±0.8mg/g extract. Among anthocyanins – determined by HPLC – malvidine was present at 1.96±0.2mg/g.
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