A small study of 30 “aeromedically fit” employees of the Royal Netherlands Air Force concluded that a 300 mg dose of caffeine limited deterioration of their nighttime performance, even if they had consumed caffeine during the previous day, according to a report by Dutch researchers.1
Measuring the Effects of Caffeine’s Jolt
A Dutch study says a midnight dose of 300 mg of caffeine can help pilots ward off sleepiness.