Microbial Species Diversity, Community Dynamics, and MetaboliteKinetics of Water Kefir FermentationWater kefir is a sour, alcoholic, and fruity fermented beverage of which the fermentation is started with water kefir grains. These water kefir grains consist of polysaccharide and contain the microorganisms responsible for the water kefir fermentation. In this work, a water kefir fermentation process...