ISHS Acta Horticulturae 629: XXVI International Horticultural Congress: The Future for Medicinal and Aromatic Plants
IS MEDICAL CONTROL OF HERBAL TEA CONSUMPTION NECESSARY? |
| Authors: | A. Blázovics, E. Rapavi, K. Hagymási, A. Balázs, M. Then, K. Szentmihályi, E. Bányai, E. Héthelyi, A. Lugasi |
| Keywords: | Bioactive constituents, toxic elements, redox homeostasis |
| Abstract:
Chinese Beiqishen tea extract was studied in an in vitro test system. Phytochemical screening and trace element analysis as well as the detection of antioxidant properties have been carried out. Total polyphenol content of the tea extract (2 g/250 ml) was 83.2 mg/100 ml, kaemferol content: 1.99 mg/100 ml and quercetin content: 0.75 mg/100 ml. Caffeine was the predominant compound responsible for refreshing. Element analysis showed relative high concentration (mg/100ml) of Al (0.562), B (0.0136), Ca (1.714), Cr (0.0006), Cu (0.0061), Fe (0.0136), K (15.92), Mg (1.465), Mn (0.44), Ni (0.0064), P (1.454) in the tea extract. Proton-donating ability (I50=0.1ml), reducing power (7.78 ascorbic acid equivalent.ml-1) and total scavenger capacity (  99 % in 0.1 ml volume) were identified as a function of concentration.
Total antioxidant status (TAS) was 8.7 mmol/L trolox equivalent.
Based on the results the tea infusion contains trace elements and caffeine in addition to polyphenols and tannins in high concentration, therefore the attention of patients suffering from gastrointestinal, renal and cardiovascular diseases, as well as in pregnancy should be called to the fact that consumption of the tea without control involves health risks.
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