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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]
Tolerance to the effects of caffeine occurs for caffeine-induced elevations in blood pressure and the subjective feelings of nervousness. Sensitization , the process whereby effects become more prominent with use, may occur for positive effects such as feelings of alertness and wellbeing. [ 122 ]
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.
The effects of caffeine and the symptoms of anxiety both increase activity within the sympathetic nervous system. Caffeine has been linked to the aggravation and maintenance of anxiety disorders, and the initiation of panic or anxiety attacks in those who are already predisposed to such phenomena. [ 3 ]
Since the vegan diet is often much higher in fiber than other diet patterns, many people find that they have more gas and bloating. Ironically, you may also become constipated. This may be ...
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 who are between 60 and 63 have a higher catch-up limit of $11,250 for a total of $34,750 in tax year 2025. Here's how age groups stack up on average and median 401(k) balances as of 2024: Age