In its scientific opinion on the safety of caffeine of 2015, the EFSA concluded that "consumption of other constituents of energy drinks at concentrations commonly present in such beverages would not affect the safety of single doses of caffeine up to 200 mg." Also, the consumption of alcohol, leading to a blood alcohol content of about 0.08%, would, according to the EFSA, not affect the safety of single doses of caffeine up to 200 mg. Up to these levels of intake, caffeine is unlikely to mask the subjective perception of alcohol intoxication. Habitual use of caffeine up to 400 mg per day does not.