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And doctors are widely taught that caffeine can cause these heart disturbances. To check, Marcus and colleagues examined 1,388 people, with an average age of 72, taking part in a larger heart study.
The study authors say that caffeine’s impact on the autonomic nervous system (which helps control things like your heart rate and blood pressure) could put undue stress on the heart, as well as ...
“Excessive daily caffeine intake can cause in the short-term increased heart rate, irritability, anxiety, headache, and insomnia. Over the long term, it can cause hypertension and even ...
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. 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 caffeine content of cola drinks and most energy drinks can be difficult to determine, because in many cases the labels do not indicate the dose per serving. Caffeine doses in these beverages range from 20 to 30 mg in some soft drinks, up to 350 mg or more in some energy drinks.
Chronic, excessive caffeine — above the recommended 400 mg a day — can elevate heart rate, (and) blood pressure, but depending on the form can come with additional drawbacks such as excessive ...
For some, drinking a high-caffeine beverage might make them feel anxious, could make their heart race, cause gastrointestinal issues, or raise blood pressure, says Stephens. These are especially ...