Equinox Fiery Ginger Kombucha is the brand's best-selling expression in its permanent range and the more intensely spiced, warming end of the broader kombucha lineup. The 'fiery' character comes from combining both ginger juice and ginger extract in the recipe, rather than a single ginger source. Fermentation takes between 10 and 14 days, according to The Grocer. The brand positions it as an alternative to traditional ginger beer for those seeking a lower-sugar fermented option.