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But according to Yawitz, “having too much can lead to anxiety, insomnia, diarrhea, jitters, a rapid heart rate, and other unpleasant side effects.” And, in very extreme cases, death. Mike Kemp ...
High caffeine consumption in energy drinks (at least one liter or 320 mg of caffeine) was associated with short-term cardiovascular side effects including hypertension, prolonged QT interval, and heart palpitations. These cardiovascular side effects were not seen with smaller amounts of caffeine consumption in energy drinks (less than 200 mg). [79]
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.
On the positive side, studies published in 2024 found that drinking coffee may help negate some of the harmful health effects of living a sedentary lifestyle and consuming caffeine may help ...
“The caffeine in coffee can lead to increased heart rate and blood pressure, ... It seems like the experts all agree that as long as you’re not experiencing any unpleasant side effects, coffee ...
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]
Some people experienced side effects like gas, nausea, loose stools, and mild headaches. ... indicate a negative influence on insulin function.” ... as caffeine can worsen symptoms. Additionally ...
There is no standard value for "a cup of coffee." 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.