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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.
Researchers say consuming more than 400 milligrams of caffeine per day could raise the risk of cardiovascular disease. Excessive caffeine from coffee, tea, energy drinks, and other beverages may ...
“While the average half-life of caffeine is between three and seven hours, people with a slower metabolism or liver problems may experience the effects of caffeine longer, and more acutely, as ...
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 ...
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]
Caffeine is the world's most widely consumed psychoactive drug. [20] [21] Unlike most other psychoactive substances, caffeine remains largely unregulated and legal in nearly all parts of the world. Caffeine is also an outlier as its use is seen as socially acceptable in most cultures with it even being encouraged.
People who chronically drink high amounts of caffeine — equivalent to four cups of coffee or two energy drinks — may increase their risk of cardiovascular disease, a new study indicates.
Caffeine-induced sleep disorder was a psychiatric disorder identified as resulting from overconsumption of the stimulant caffeine. Caffeine is one of the most widely consumed psychoactive drugs: almost 90% of Americans in a survey consume some type of caffeine each day. [1] "When caffeine is consumed immediately before bedtime or ...