Ale to the selling of beer labeled "strong beer" that had actually been diluted with small beer. In medieval times, ale may have been safer to drink than most water (the germ theory of disease was unheard of, and the sterilizing properties of boiling unknown); however, there is no period evidence that people were aware of this nor that they chose to drink ale for this reason. The alcohol, hops, and some ingredients in gruit used to preserve some ales may have contributed to their lower load of pathogens, when compared to water. However, ale was largely safer due to the
Old ale the blend. In London especially, Burton was a synonym for old ale. A "winter warmer" is a traditional malty-sweet strong ale that is brewed in the winter months. It is usually quite dark, but not as dark as a stout, with a big malt presence. Sometimes, winter warmers have a few spices, especially in the United States, although spices are not necessarily a required ingredient in a winter warmer. The primary characteristic is strength; the average alcohol content by volume ranges from 6.0% to 8.0% ABV and some winter warmers reach 10% ABV or more. Christmas beer is another type