Elena Kurin
Faculty of Pharmacy, Comenius University, Bratislava, Slovakia
Title: Herbal tea mixtures: The synergy in the background
Biography
Biography: Elena Kurin
Abstract
Camellia sinensis Kuntze and Mentha × piperita L. are plants from different taxonomic orders. However, both enjoy great worldwide popularity for the well-known drinks prepared as a water infusion from their leaves: green tea and peppermint tea. Both plants are a rich source of polyphenols, known antioxidants that are the subject of research in medicinal plants and food stabilization as well. Most of the studies focus on investigating the effects of individual plants. But in combinations a hidden synergy can occur, mainly when the chemical composition of individual plants is different. Therefore, we explored the antioxidant activity of peppermint and green tea leaves lyophilizates, respectively. In addition, using different mixing method and different extract ratios we prepared lyophilized mixtures, which antioxidant activity was subsequently evaluated. Interaction analysis revealed the hidden synergy in several mixtures to quench the DPPH radical and in the DCF cell-based antioxidant assay. We also performed an interaction analysis of the combination of polyphenols present in the green tea (epigallocatechin gallate and quercetin) and peppermint tea (rosmarinic acid), respectively. We discovered synergy among polyphenols in the DPPH assay, which can partially enlighten the interaction of the lyophilizates on molecular level. Our work supports the old practice of combining the herbal substances into herbal tea mixtures, where the achieved effects are higher, than expected.