Salt and sugar are two common ingredients in beer. While the amount of each varies depending on the type of beer, both are present in most beers. Sugar is used as a fermentation agent, while salt is used to add flavor and body. While beer does contain sugar and salt, the levels are generally low and should not pose a problem for most people.beer is a fermented beverage made from grains, typically barley. During the brewing process, yeast is used to convert the sugars in the grain into alcohol. There is typically a small amount of residual sugar left in the beer after fermentation, but this is usually not enough to taste. Some beers may also contain salt, which is used to balance out the sweetness of the malt.