Potencjał przeciwutleniający oraz związki polifenolowe glikolowych ekstraktów z Hippophaë rhamnoides L. i Vaccinium oxycoccos L.

Monika Michalak¹, *Anna Podsędek², Ryszard Glinka¹

Summary
Sea buckthorn Hippophaë rhamnoides L. and European cranberry Vaccinium oxycoccos L. fruits are rich in compounds with antioxidant properties. They contain polyphenolic compounds which have a significant effect on the body and human skin.
The aim of the study was to compare antioxidant capacity of glycolic extracts of Sea buckthorn and European cranberry berries and determination of their phenolic profiles.
Antioxidant potential of Hippophaë rhamnoides L. and Vaccinium oxycoccos L. glycolic extracts was tested using ABTS and FRAP methods and was expressed as Trolox equivalent (TEAC). Moreover, total content of polyphenols and proanthocyanidins was determined by spectrophotometric methods and phenolic profiles were analysed with the use of HPLC method.
Glycolic extract of Sea buckthorn four and five times exceeded the extract of European cranberry in terms of free radical scavenging effectiveness and reduction potential, respectively. The total content of polyphenols in Sea buckthorn and cranberry is 60.85 and 21.39 mg/100 ml of extract, respectively. Flavonols dominated among the polyphenols of Sea buckthorn extract, while in cranberry extract proanthocyanidins constituted about 50% of polyphenols.
The results of this study demonstrate that Sea buckthorn fruit glycolic extract can be more valuable source of antioxidants

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