Influence of Caffeine on Physiological and Cognitive Functions of Humans

The review is devoted to the analysis of the effect of caffeine on physiological and cognitive functions of humans. The methodological aspects of experiments with the use of caffeine are discussed, in particular, the dosage, the frequency of use, and in combination with other products. The possibilities of the use of caffeine for studying physiological and mental phenomena, as well as age-related and individual psychological differences in reactions to caffeine, were shown.