Ingesting caffeine through the consumption of coffee, tea, soda or chocolate will stimulate your nervous system and typically result in feelings of alertness, wakefulness and improved focus. Individuals who consume caffeinated beverages on a daily basis often use these drinks to wake up and stay energized. Caffeine can also cause a variety of problematic mood changes when it is consumed, especially if it is used in excess or use is suddenly discontinued.
Mood Enhancement and Alertness
As your nervous system receives stimulation from caffeine you are likely to feel energized and experience enhanced feelings of well-being. Many individuals feel that caffeine offers a helpful boost in relation to daily tasks. Caffeine may help you work in a more focused manner, and you may feel more prepared or motivated to take part in activities or complete projects.
Adverse Effects
The stimulant effects of caffeine may also have adverse nervous system responses. Consuming caffeine in excess can result in feelings of restlessness and anxiety, and these mood changes may affect your ability to concentrate and leave you feeling distracted and irritable or depressed. The National Institutes of Health (NIH) also note that caffeine can cause sleep disturbances, and a lack of sleep may result in fatigue and loss of focus.
Caffeine Withdrawal and Mood
If you consume caffeine on a daily basis and you reduce or discontinue your use you may experience marked symptoms of withdrawal such as headache, difficulty concentrating, drowsiness and insomnia. People more susceptible to negative moods may experience periods of depression or marked anxiety and irritability during a period of caffeine withdrawal.
Expert Insights
The NIH notes that you should limit your caffeine intake to less than 250 mg per day, which is approximately three cups of coffee or five servings of caffeinated soda drinks. Excess use of caffeine can lead to unpleasant mood changes and possible dependence. Users who have sensitivities to stimulants and struggle with anxiety or insomnia are cautioned to limit or avoid use of caffeine in their diets.
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