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This led the researchers to conclude that caffeine effects phonological priming rather than memory storage. A study in which caffeinated subjects were tested for recall after fast and slow presentation of word lists found no significant effects of caffeine for male subjects. Female subjects showed decreased recall after slow presentation. [5]
Caffeine is a central nervous system (CNS) stimulant of the methylxanthine class and is the most commonly consumed psychoactive substance globally. [9] [10] It is mainly used for its eugeroic (wakefulness promoting), ergogenic (physical performance-enhancing), or nootropic (cognitive-enhancing) properties.
The potential benefits of caffeine are increased focus and reaction time, reduced perceived effort, and faster sprint performance. It blocks tiredness-causing adenosine from receptors in the brain.
According to a 2020 study in the United States, coffee is the major source of caffeine intake in middle-aged adults, while soft drinks and tea are the major sources in adolescents. [8] Energy drinks are more commonly consumed as a source of caffeine in adolescents as compared to adults. [8]
The study authors say that caffeine’s impact on the autonomic nervous system ... people with a slower metabolism or liver problems may experience the effects of caffeine longer, and more acutely ...
Students with consistent sleeping schedules had better grades on average than students with irregular sleep schedules according to a study conducted by Brigham and Women's Hospital. [56] Since circadian rhythm is a full 24-hour rhythm, it can also be beneficial to keep a regular meal and exercise schedule throughout the day.
Treatment of mild caffeine intoxication is directed toward symptom relief; severe intoxication may require peritoneal dialysis, hemodialysis, or hemofiltration. [3] Control of caffeine intake requires awareness of the caffeine content of caffeinated beverages, over-the-counter drugs, and other sources of caffeine in the diet.
A large 2024 study, [21] involving close to two hundred thousand participants using the UK Biobank, indicated that a habitual caffeine intake, at moderate levels of 200 mg - 300 mg of caffeine per day "was associated with a lower risk of new-onset CM [Cardiometabolic multimorbidity] and could play important roles in almost all transition phases ...