Abstract
Kombucha is a beverage fermented by SCOBY, which is a symbiotic culture of bacteria and yeast. Recently, kombucha has received significant attention due to its health benefits, which include antioxidant and anti-obesity effects. In this study, we investigated the characteristics of kombucha made with Tartary buckwheat and burdock, both known for their high polyphenols content. First, the total polyphenol content and antioxidant activity were measured by 2,2-diphenyl-1-picrylhydrazyl and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) radical scavenging assays, which revealed a polyphenol content of 180 ug/mL in Tartary buckwheat kombucha and a high radical scavenging ability of over 90% in both kombucha preparations. Analysis of the changes in the organic acid content during fermentation revealed increases in various organic acid contents, such as glucuronic acid, lactic acid, and acetic acid. Glucuronic acid, especially, which has many functional properties in health, was found to be produced at a concentration of 4.03 g/L in Tartary buckwheat kombucha. Pancreatic lipase inhibitory ability analysis revealed inhibitory effects of 40.47% and 57.68% for Tartary buckwheat and burdock kombucha, respectively. The results of this study confirmed the antioxidant and anti-obesity effects of kombucha made from Tartary buckwheat and burdock, indicating the potential value of these ingredients as functional kombucha ingredients.
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