GUTsy Captain Kombucha Zero - Original is the unflavoured foundation of the brand's Zero sub-range, a non-alcoholic kombucha line formulated to carry zero sugar and zero calories while retaining authentic fermentation character. The Zero range was a distinct product launch covered in the trade press, representing the brand's move beyond its standard organic kombucha into a lower-calorie formulation. No artificial flavours or sweeteners are added to the product. The Zero sub-range also includes a number of flavoured variants for those who prefer the Zero formulation with added fruit character.