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Caffeine causes the release of epinephrine from the adrenal medulla. In small doses, caffeine can improve endurance. [22] It has also been shown to delay the onset of fatigue in exercise. The most probable mechanism for the delay of fatigue is through the obstruction of adenosine receptors in the central nervous system. [23]
You can even have caffeine withdrawal. Symptoms can be similar to those of withdrawal from other mood-altering substances, including headaches, fatigue or drowsiness, depressed mood, irritability ...
In chronic psychiatric patients, caffeine, the major active ingredient in coffee, is associated with anxiety. [31] [32] At high doses, typically greater than 300 mg, caffeine can both cause and worsen anxiety. [33] For some people, discontinuing caffeine use can significantly reduce anxiety. [34]
Caffeine dependence can cause a host of physiological effects if caffeine consumption is not maintained. Withdrawal symptoms may include headaches, fatigue, difficulty concentrating, lack of motivation, mood swings, nausea, insomnia, dizziness, cardiac issues, hypertension, anxiety, backaches, and joint pain; these can range in severity from mild to severe. [18]
Caffeine even has medical uses: It can help with pain, including headaches, and also stimulates smooth muscles in your body and can help with constipation, Hunnes says. But there can be a definite ...
In older adults, memory is typically best in the morning and gradually declines over the day. Those who consumed caffeine in the morning showed much better memory, both short-term and long-term than those who consumed a placebo, especially in late afternoon, where memory and attention may be most crucial to daily functioning for the elderly.
The person could suffer from severe symptoms of caffeine withdrawal including headaches, fatigue, and difficulty concentrating. It is recommended that the person reduces caffeine consumption gradually to avoid withdrawal as attempts to suddenly discontinue all caffeine consumption are frequently abandoned due to the severity of the withdrawal ...
Consuming high amounts of the stimulant caffeine can result in interrupted sleep patterns and sometimes sleep deprivation. This vicious cycle can result in drowsiness which can then result in a higher consumption of caffeine in order to stay awake the next day. This cycle can lead to decreased cognitive function and an overall feeling of fatigue.
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