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Dr. Rohit Vuppuluri, an interventional cardiologist, tells Yahoo Life that caffeine is safe to use in moderation — less than 400 mg per day, according to the Food and Drug Administration (FDA ...
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] These symptoms may occur within 12–24 hours and can last two to nine days.
If you work an irregular or overnight shift, similarly stop drinking caffeine 10 or 11 hours before you go to bed. The Sleep Foundation gives you a little more wiggle room, suggesting stopping ...
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The diagnostic criteria for caffeine withdrawal require a previous prolonged daily use of caffeine. [123] Following 24 hours of a marked reduction in consumption, a minimum of 3 of these signs or symptoms is required to meet withdrawal criteria: difficulty concentrating, depressed mood/irritability, flu-like symptoms, headache, and fatigue. [123]
A caffeine dosage of 3–5 mg/kg [12] may improve high-intensity sprint performance when consumed prior to exercise. One analysis showed that there were small improvements, in which they discussed for these activities correlate to meaningful differences in performance. [ 14 ]
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.
Caffeine can cause a physical dependence, if consumed in excessive amounts. [3] The need for caffeine can be identified when individuals feel headaches, fatigue and muscle pain 24 hours after their last energy drink. [4] Some commercially distributed drinks contain guarana, a South American berry with a caffeine content about twice that of ...