Beer style beer differently. Since sugars are converted to alcohol during the process of fermentation, gravity can be used to estimate the final alcohol. In beer brewing, a distinction is made between the "original gravity", the gravity of the wort before fermentation has begun, and the "final gravity" of the product when fermentation has completed. Since the concentration of sugars is directly proportional to the gravity, the original gravity gives a brewer an idea of the potential alcoholic strength of the final product. After fermentation, the differences between the final and original gravities indicates the amount of sugar converted into alcohol, allowing
Alcohol congener analysis from blood samples, by targeting iso-alpha-acids-type compounds that are derived from the hops used during the brewing process. Levels of these compounds have been found in blood several hours after ingestion in controlled drinking studies using "high-" and "low-hopped" beers. This methodology presents new possibilities for accompanying-alcohol analysis as ingredient-specific markers are developed for other alcohol beverages, e.g. wine and spirits. Alcohol congener analysis Alcohol congener analysis of blood and urine is used to provide an indication of the type of alcoholic beverage consumed. The analysis involves investigating compounds called congeners that give the beverage a distinctive appearance, aroma, and