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Antioxidant profile of Lamiaceae plant extracts: Impact of rosmarinic acid content

The aim of this study was to compare the antioxidant properties of five Lamiaceae plant extracts using eight different antioxidant assays and to investigate the influence of the rosmarinic acid content on the antioxidant properties of investigated plant extracts. The research includes five plant extracts: Melissa officinalis, Mentha piperita, Origanum vulgare, Salvia officinalis and Thymus serpyllum. The content of rosmarinic acid in extracts was determined using HPLC-RP-DAD. All extracts were extremely rich in phenolic compounds and contained high concentrations of rosmarinic acid. The highest rosmarinic acid content as well as the best antioxidant properties using most of the methods were obtained for Melissa officinalis. The significance and role of rosmarinic acid in the antioxidant properties of Lamiaceae plant extracts was confirmed and undoubted, but the contribution of other compounds and their possible cumulative or synergistic action also should not be neglected.

antioxidants ; Lamiaceae ; rosmarinic acid

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