Hard Kombucha differs from regular Kombucha in the proportions of tea, sugar, and starter culture of bacteria and yeast. The fermentation process that yields regular Kombucha naturally produces some alcohol, but not enough for the ABV to exceed .5 percent ABV; whereas the different proportions of ingredients in Hard Kombucha combined with a longer fermentation result in a higher ABV due to the larger amount of sugar that gets converted to alcohol in the lengthier process. Hard Kombucha is brewed with natural ingredients and can come in a variety of flavors. They also tend to be free of wheat and barley, so Hard Kombucha can be a good gluten-free option.