Captain Morgan's Original Spiced Rum has the lowest content of alcohol, the least amount of calories and contains no sugar. Hard liquors, including gin, vodka, whiskey and rum, contain no sugar if you do not mix them with anything else.
The natural sugars in the fruits and grains are removed in the distillation process. Beer also has low or no sugar content, although it can have a considerably high carbohydrate count due to the grains.
Liqueurs are high in sugar content. Mixers, such as tonic water, sweet and sour mixes, fruit juice and soda, add sugar content when mixed with liquor.