Barley more diverse sources of alcohol, such as the more common corn, rye and wheat in the USA. In the US, a grain type may be identified on a whisky label if that type of grain constitutes 51% or more of the ingredients and certain other conditions are satisfied. About 25% of the United States' production of barley is used for malting, for which barley is the best-suited grain. Barley wine is a style of strong beer from the English brewing tradition. Another alcoholic drink known by the same name, enjoyed in the 18th century, was prepared by boiling barley in
Caffeinated alcoholic drink as caffeine can mask some of the sensory cues individuals might normally rely on to determine their level of intoxication. The consumption of this drink and the delayed intoxication impairment could lead to negative consequences such as the increased stimulation and intoxication levels while decreasing the ability to operate a motor vehicle. The US Food and Drug Administration (FDA) has looked at peer-reviewed studies and has come to the conclusion that risky behaviors which could lead to life-threatening situations are directly correlated with the consumption of caffeinated alcoholic drinks. Universities have conducted studies to compare the outcomes of the consumption