Hayeong Kim , Jihyeon Jeon , Jiyeon Lee , Chaeri Song , Boncheol Gu , Nahyun Mariah Kim , Tae-hui Yang , Sejin Oh , Soochul Park , Kunal Pal , Ghahyun Jeffrey Kim , Doman Kim
{"title":"Utilizing kombucha culture for coffee fermentation and biochemical characteristic analysis","authors":"Hayeong Kim , Jihyeon Jeon , Jiyeon Lee , Chaeri Song , Boncheol Gu , Nahyun Mariah Kim , Tae-hui Yang , Sejin Oh , Soochul Park , Kunal Pal , Ghahyun Jeffrey Kim , Doman Kim","doi":"10.1016/j.crfs.2025.100996","DOIUrl":null,"url":null,"abstract":"<div><div>Coffee, an important global commodity, is grown on 10.2 million hectares in over 80 countries. Arabica coffee (<em>Coffea arabica</em>) is popular worldwide due to its superior flavour. As consumer interest in coffee flavour and quality continues to grow, this study aims to enhance the bioactive compounds, functionality, and sensory properties of Arabica coffee (<em>Coffea arabica</em>) by fermentation with black tea kombucha (K-coffee) and coffee kombucha (CK-coffee). Coffee showed a decrease in pH and an increase in titratable acidity during fermentation. The total phenolic and flavonoid content increased 1.77- and 1.95-fold in K-coffee and 2.07- and 2.60-fold in CK-coffee, respectively, after 24 h of fermentation compared to the coffee control, in which the kombucha broth was not inoculated, with an increased in trigonelline, chlorogenic acid and caffeic acid content. The caffeine content in CK-coffee increased 1.33-fold after 12 h of fermentation and remained relatively stable in K-coffee up to 24 h of fermentation compared to the coffee control. The antioxidant activity and inhibitory effect against α-glucosidase of fermented coffee increased to 2.24- and 2.40-fold after 24 h of fermentation, respectively, compared to the coffee control. Sensory evaluation highlighted noticeable differences in flavour among unfermented coffee, K-coffee, and CK-coffee with changes in volatile aroma compounds. These results support the feasibility of kombucha fermentation as a novel approach to develop specialty coffees with enhanced flavour and nutritional profiles.</div></div>","PeriodicalId":10939,"journal":{"name":"Current Research in Food Science","volume":"10 ","pages":"Article 100996"},"PeriodicalIF":6.2000,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Current Research in Food Science","FirstCategoryId":"97","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2665927125000279","RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"FOOD SCIENCE & TECHNOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Coffee, an important global commodity, is grown on 10.2 million hectares in over 80 countries. Arabica coffee (Coffea arabica) is popular worldwide due to its superior flavour. As consumer interest in coffee flavour and quality continues to grow, this study aims to enhance the bioactive compounds, functionality, and sensory properties of Arabica coffee (Coffea arabica) by fermentation with black tea kombucha (K-coffee) and coffee kombucha (CK-coffee). Coffee showed a decrease in pH and an increase in titratable acidity during fermentation. The total phenolic and flavonoid content increased 1.77- and 1.95-fold in K-coffee and 2.07- and 2.60-fold in CK-coffee, respectively, after 24 h of fermentation compared to the coffee control, in which the kombucha broth was not inoculated, with an increased in trigonelline, chlorogenic acid and caffeic acid content. The caffeine content in CK-coffee increased 1.33-fold after 12 h of fermentation and remained relatively stable in K-coffee up to 24 h of fermentation compared to the coffee control. The antioxidant activity and inhibitory effect against α-glucosidase of fermented coffee increased to 2.24- and 2.40-fold after 24 h of fermentation, respectively, compared to the coffee control. Sensory evaluation highlighted noticeable differences in flavour among unfermented coffee, K-coffee, and CK-coffee with changes in volatile aroma compounds. These results support the feasibility of kombucha fermentation as a novel approach to develop specialty coffees with enhanced flavour and nutritional profiles.
期刊介绍:
Current Research in Food Science is an international peer-reviewed journal dedicated to advancing the breadth of knowledge in the field of food science. It serves as a platform for publishing original research articles and short communications that encompass a wide array of topics, including food chemistry, physics, microbiology, nutrition, nutraceuticals, process and package engineering, materials science, food sustainability, and food security. By covering these diverse areas, the journal aims to provide a comprehensive source of the latest scientific findings and technological advancements that are shaping the future of the food industry. The journal's scope is designed to address the multidisciplinary nature of food science, reflecting its commitment to promoting innovation and ensuring the safety and quality of the food supply.