Most beers deteriorate in taste as they age. The exceptions are a few beer categories that improve with age, much like a high-quality Cabernet Sauvignon or Syrah. Beers such as Barley Wine, Imperial Stout, Belgian Quadruple, Lambic, and certain sour beers — generally beers with high alcohol content, low hop aromas, and special yeast strains — often improve in flavor and complexity when matured under controlled conditions. However, these are the exception.