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A study from the University of Kentucky showed that more than 78% of college freshmen consume above the recommended amount of caffeine each day. [21] One-tenth of the US population already suffers from insomnia, and in turn caffeine is often used as a countermeasure for the side effects associated with this lack of sleep. [22]
People with low caffeine intake have a decreased performance later in the day, compared to moderate and a high-level caffeine intake. Thus the effect of caffeine on short-term memory can differ due to many other factors and thus cannot be instantly generalized. [6]
The health effects of coffee include various possible health benefits and health risks. [ 1 ] A 2017 umbrella review of meta-analyses found that drinking coffee is generally safe within usual levels of intake and is more likely to improve health outcomes than to cause harm at doses of 3 or 4 cups of coffee daily.
Caffeine dependence can cause a host of physiological effects if caffeine consumption is not maintained. Commonly known caffeine withdrawal symptoms include headaches, fatigue, loss of focus, lack of motivation, mood swings, nausea, insomnia, dizziness, cardiac issues, hypertension, anxiety, and backache and joint pain; these can range in severity from mild to severe. [18]
The place most people find their caffeine is in their coffee cups, and there can be an awful lot of it there. The U.S. Food and Drug Administration recommends limiting your caffeine intake to 400 ...
Caffeine – ADHD is associated with increased caffeine consumption, and caffeine's stimulant effects on cognition may have some benefits for ADHD. [249] Limited evidence suggests a small therapeutic effect that is markedly inferior to standard treatments like methylphenidate and dextroamphetamine while still producing similar or greater side ...
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.
And while there is evidence that intermittent fasting may help some people lose weight in the short term, skipping breakfast and intermittent fasting can both have some negative health consequences.