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The effect of caffeine on short-term memory (STM) is debated amongst academics. Studies conclude that caffeine intake improves the performance of short-term and working memory, specifically associating caffeine intake with a shortened reaction time. [1]
However, the MRI scans showed that drinking coffee increased activity in parts of the brain involved in short-term memory, attention and focus, whereas ingesting caffeine on its own did not.
At normal doses, caffeine has variable effects on learning and memory, but it generally improves reaction time, wakefulness, concentration, and motor coordination. [52] [53] The amount of caffeine needed to produce these effects varies from person to person, depending on body size and degree of tolerance. [52]
Caffeine-induced anxiety disorder is a subclass of the DSM-5 diagnosis of substance/medication-induced anxiety disorder. [1] Consumption of caffeine has long been linked to anxiety. [2] The effects of caffeine and the symptoms of anxiety both increase activity within the sympathetic nervous system.
The study, which enlisted 23 men with a "moderate habitual caffeine intake" (under 300 mg) between the ages of 18 and 40, discovered that while a 100 mg dose of caffeine can be consumed up to four ...
Kim Yawitz, RD, owner of Two Six Fitness in St. Louis, said that it “increases activity in the central nervous system and speeds up the rate of communication between the brain and the rest of ...
The caffeine in energy drinks are what is primarily responsible for the increase of energy. Each drink varies widely between 45–500 mg of caffeine. 34% of 18-24-year-olds consume energy drinks regularly. [25] 67% of users consume energy drinks to compensate for the lack of sleep. [26]
However, caffeine, particularly when it’s overused, can cause unwanted side effects like “insomnia, digestive problems, increased blood pressure and faster heart rates,” Vuppuluri says.