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The FDA’s recommendations regarding daily caffeine consumption for adults are uncomfortably noncommittal. Their 2023 report states that 400 milligrams a day is “an amount not generally ...
In fact, one small study of subjects who showed signs of memory problems found that over a 2- to 4-year period, people with lower blood levels of caffeine were more likely to develop dementia than ...
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.
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]
Regular caffeine consumption was defined as the intake of caffeinated drinks 5 days per week for more than a year. Caffeine drinks were centered on coffee and tea as well as aerated beverages such as:
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 FDA’s recommendations regarding daily caffeine consumption for adults are uncomfortably noncommittal. Their 2023 report states that 400 milligrams a day is “an amount not generally ...
Dry tea has more caffeine by weight than dry coffee; nevertheless, more dry coffee than dry tea is used in typical drink preparations, [21] which results in a cup of brewed tea containing significantly less caffeine than a cup of coffee of the same size. The caffeine in tea is a mild diuretic.