Antioxidant capacity of herbal teas from Bulgarian market
Elena Shopova, Sergei Ivanov, Liliana Brankova, Daniela Moyankova, Desisslava Georgieva, Djovani Polizoev, Dimitar Djilianov
Abstract: The antioxidant capacity of numerous plant species with medical potential, as well as the tea plant (Camellia sinensis L.) have been extensively studied. On the other hand, such data for herbal tea blends, taken directly from the market are scarce.
The aim of our study was to evaluate the antioxidant capacity and phenol content of tea and herbal tea blends available on Bulgarian market and to assess Haberlea rhodopensis leaves as a potential ingredient of herbal teas. We applied two methods to evaluate the antioxidant capacity - the Ferric reducing antioxidant power (FRAP) and Trolox equivalent antioxidant capacity (TEAC) assays, after a two step procedure of processing and extraction of water-soluble and lipo-soluble antioxidants.
We did not find a direct relationship between the content of phenols and the antioxidant capacity of the studied herbal teas. The commercial samples of Camellia sinensis L. (North Vietnam cultivation, Tikanium, Green tea) had the highest antioxidant capacity. According to TEAC and FRAP assay Common St John's wort, Oregano, and Garden sage showed antioxidant capacity close to that of Green tea.
Maximum antioxidant capacity and, hence maximal health benefits could be obtained from ca. 30 min infusions of Roselle tea and especially Haberlea leaves. This makes cultivated Haberlea rhodopensis a valuable potential ingredient for new blends of herbal tea with high antioxidant capacity.
Keywords: Antioxidants; FRAP; Haberlea rhodopensis; herbal teas; phenols; TAC; TEAC
Citation: Shopova, E., Ivanov, S., Brankova, L., Moyankova, D., Georgieva, D., Polizoev, D. & Djilianov, D. (2023). Antioxidant capacity of herbal teas from Bulgarian market. Bulg. J. Agric. Sci., 29(6), 1159–1164.
| References: (click to open/close) | Abudureheman, B., Yu, X., Fang, D. & Zhang, H. (2022). Enzymatic oxidation of tea catechins and its mechanism. Molecules, 27(3), 942-957.
Benzie, I. & Strain, J. (1996). The Ferric Reducing Ability of Plasma (FRAP) as a measure of “Antioxidant Power: The FRAP Assay”. Analytical Biochemistry, 239, 70-76.
Cai, Y., Luo, Q., Sun, M. & Corke, H. (2004). Antioxidant activity and phenolic compounds of 112 traditional Chinese medicinal plants associated with anticancer. Life Science, 74(17), 2157-2184.
Cao, S., Zhao, C., Gan, R., Xu, X., Wei, X., Corke, H., Atanasov, A. & Li, H. (2019). Effects and mechanisms of tea and its bioactive compounds for the prevention and treatment of cardiovascular diseases: An Updated Review. Antioxidants, 8, 166-183.
Cleverdon, R., Elhalaby Y., McAlpine, M., Gittings, W. & Ward, W.E. (2018). Total polyphenol content and antioxidant capacity of tea bags: Comparison of black, green, red rooibos, chamomile and peppermint over different steep times. Beverages, 4(1), 15-28.
Crespy, V. & Williamson, G. (2004). A review of the health effects of green tea catechins in in vivo animal models. The Journal of Nutrition, 134, 3431-3440.
Dinakar, C., Djilianov, D. & Bartels, D. (2012). Photosynthesis in desiccation tolerant plants: energy metabolism and antioxidative stress defense. Plant Science, 82, 29-41.
Djilianov, D., Genova, G., Parvanova, D., Zapryanova, N., Konstantinova, T. & Atanassov, A. (2005). In vitro culture of the resurrection plant Haberlea rhodopensis. Plant Cell, Tissue and Organ Culture, 80(1), 115-118.
Du Toit, R., Volsteedt, Y. & Apostolides, Z. (2001). Comparison of the antioxidant content of fruits, vegetables and teas measured as vitamin C equivalents. Toxicology, 166(1-2), 63-69.
Gao, X., Bjork, L., Trajkovski, V. & Uggla, M. (2000). Evaluation of antioxidant activities of rosehip ethanol extracts in different test systems. Journal of the Science of Food and Agriculture, 80, 2021-2027.
Gechev, Ts., Hille, J., Woerdenbag, H., Benina, M., Mehterov, N., Toneva, V., Fernie, A. & Mueller-Roeber B. (2014) Natural products from resurrection plants: Potential for medical applications. Biotechnology Advances 32, 1091–1101.
Halvorsen, B. L., Holte, K., Myhrstad, M. C. W., Barikmo, I., Hvattum, E., Remberg, S. F., Wold, A. B., Haffner, K., Baugerød, H., Andersen, L. F., Moskaug, Ø., Jacobs, D. R., Jr. & Blomhoff, R. (2002). A systematic screening of total antioxidants in dietary plants. Journal of Nutrition, 132, 461-471.
Hussein, E. A., Thron, C., Ghaziasgar, M., Vaccari, M., Marnewick, J. L. & Hussein, A. A. (2022). Comparison of phenolic content and antioxidant activity for fermented and unfermented rooibos samples extracted with water and methanol. Plants, 11, 16-34.
Ivanova, D., Gerova, D., Chervenkov, T. & Yankova, T. (2005). Polyphenols and antioxidant capacity of Bulgarian medicinal plants. Journal of Ethnopharmacology, 96, 145-150.
Katalinic, V., Milos, M., Kulisic, T. & Jukic, M. (2006). Screening of 70 Medicinal Plant Extracts for Antioxidant Capacity and Total Phenols. Food Chemistry, 94, 550-557.
Kerchev, P. & Ivanov, S. (2008). Influence of Extraction Techniques and Solvents on the Antioxidant Capacity of Plant Material. Biotechnology & Biotechnological Equipment, 22(1), 556-559.
Koeppen, B. H. & Roux, D. G. (1966). C-glycosylflavonoids. The chemistry of aspalathin. Biochemical Journal, 99(3), 604-609.
Liu, J., Moyankova, D., Djilianov, D. & Deng, X. (2019). Common and specific mechanisms of desiccation tolerance in two Gesneriaceae resurrection plants: Multiomics evidences. Frontiers in Plant Science, 10, 1067.
McKay, D. L. & Blumberg, J. B. (2002). The role of tea in human health: an update. Journal of the American College of Nutrition, 21(1), 1-13.
Moyankova, D. & Djilianov, D. (2016). Time- and space-saving procedure to obtain extracts with antioxidative properties from Haberlea rhodopensis. Reports of the Bulgarian Academy of Sciences, 69(7), 879-884.
Moyankova, D., Mladenov, P., Berkov, S., Peshev, D., Georgieva, D. & Djilianov, D. (2014) Metabolic profiling of the resurrection plant Haberlea rhodopensis during desiccation and recovery. Physiologia Plantarum, 152(4), 675–687.
Pellegrini, N., Yang, R. M. & Rice-Evans, C. (1999). Screening of dietary carotenoids and carotenoid-rich fruit extracts for antioxidant activities applying 2, 2’-azinobis (3-ethylenebenzothiazoline-6-sulfonic acid) radical cation decolorization assay. Methods in Enzymology, 299, 379-384.
Prior, R. L., Wu, X. & Schaich, K. (2005). Standardized methods for the determination of antioxidant capacity and phenolics in foods and dietary supplements. Journal of Agricultural and Food Chemistry, 53(10), 4290-4302.
Rice-Evans, C. A., Miller, N. J. & Paganga, G. (1997). Antioxidant properties of phenolic compounds. Trends in Plant Science, 2, 152-159.
Sanchez-Moreno, C. (2002). Review: Methods Used to Evaluate the Free Radical Scavenging Activity in Food and Biological Systems. International Journal of Food Science and Technology, 3, 121-137.
Schlesier, K., Harwat, M., Bohm, V. & Bitsch, R. (2002). Assessment of Antioxidant Activity by Using Different in Vitro Methods. Free Radical Research, 36, 177-187.
Su, X., Duan, J., Jiang, Y., Duan, X. & Chen, F. (2007). Polyphenolic Profile and Antioxidant Activities of Oolong Tea Infusion under Various Steeping Conditions. International Journal of Molecular Sciences. 8(12), 1196-1205.
Swain, T. & Goldstein, J. L. (1964). The quantitative analysis of phenolic compounds. In: Methods in polyphenol chemistry (Pridham JB ed) Pergamon Press, Oxford, 131-146.
Todorova, R. & Atanasov, A. (2016) Haberlea rhodopensis: pharmaceutical and medical potential as a food additive. Natural Product Research, 30(5), 507-529.
Trouillas, P., Calliste, C. A., Allais, D. P., Simon, A., Marfak, A., Delage, C. & Duroux, J. L. (2003). Antioxidant, Anti-Inflammatory and Antiproliferative Properties of Sixteen Water Plant Extracts Used in the Limousin Countryside as Herbal Teas. Food Chemistry, 80, 399-407.
Von Gadow, A., Joubert, E. & Hansmann, C. F. (1997). Comparison of the antioxidant activity of aspalathin with that of other plant phenols of rooibos tea (Aspalathus linearis), α-tocopherol, BHT, and BHA. Journal of Agricultural and Food Chemistry, 45, 632-638.
Wilson, K. C. & Clifford, M. N. (1992). In: Tea. Cultivation to Consumption. Chapman and Hall, London, UK.
Zheng, W. & Wang, S. Y. (2001). Antioxidant activity and phenolic compounds in selected herbs. Journal of Agricultural and Food Chemistry, 49(11), 5165-5170.
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| Date published: 2023-12-15
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